高考英语完形填空专题训练题30套(含答案) 学校:___________姓名：___________班级：___________考号：___________一、完形填空Once a psychology professor walked around on a stage while teaching stress management principles to an auditorium filled with students. As she ___1___ a glass of water, everyone expected they'd be asked the typical "glass half empty or glass half full" question. ___2___，with a smile on her face, the professor asked, “How heavy is this glass of waterI'm holding?”Students shouted out answers ranging from eight ounces to a couple pounds.She replied, “From my perspective, the ___3___ weight of this glass doesn't matter. It all depends on how long I ___4___ it. If I hold it for a minute or two, it's fairly light. If I hold it for an hour straight, its weight might make my ___5___ ache a little. If I hold it for a day straight, my arm will likely cramp up(痉挛) and feel completely___6___ and paralyzed, forcing me to ___7___the glass to the floor. In each case, the weight of the glass doesn't change, but the longer I hold it, the ___8___ it feels to me.”As the class ___9___ their heads in agreement, she continued, "Your ___10___ and worries in life are very much like this glass of water. Think about them for a while and___11___ happens. Think about them a bit longer and you begin to ache a little. Think about them all day long, and you will feel completely paralyzed -___12___ of doing anything else until you put them down."It's important to remember to ___13___ your stresses and worries. No matter what happens during the day, as early in the evening as you can, put all your ___14___ down. Don't carry them through the night and into the next day with you. If you still ___15___ the weight of yesterday's stress, it's a strong sign that it's time to put the glass down.1．A．touched B．delivered C．raised D．dripped2．A．Instead B．Besides C．However D．Therefore3．A．rough B．exact C．extra D．theoretical4．A．hold B．observe C．break D．like5．A．head B．1eg C．back D．arm6．A．dizzy B．numb C．broken D．wounded7．A．throw B．take C．drop D．put8．A．happier B．sadder C．steadier D．heavier9．A．nodded B．shook C．swung D．lowered10．A．pains B．stresses C．wealth D．health11．A．something B．everything C．nothing D．anything12．A．unaware B．incapable C．impatient D．intolerant13．A．get hold of B．let go of C．catch sight of D．make senseof14．A．glasses B．arms C．things D．burdens15．A．think B．remember C．feel D．cherish It was sunny last Friday. I arrived at the railway station at three in the afternoon. I would take the ____16____to Shanghai to see my old friend Jack. But it was two hours____17____my train left. I thought it was the perfect time and place to look ____18____an act of kindness to do.Outside the station, there was a girl having____19____for sale. I told her that I’d like to buy flowers for someone else, and that she could____20____who she will give the flowers to. She looked a little puzzled(困惑的), ____21____I suggested that perhaps she could give the flowers to someone who looked a little____22____. That was because the flowers might cheer him or her up.“That’s a crazy idea!” said the girl. But then I explained a little more about the idea of doing something for a____23____, and she understood.“I’m leaving for Shanghai and then I’ll____24____know how it turns out,” I said. “But you will have a good_____25_____to make someone happy. _____26_____good deeds(善举)we do, they always come back to us.” At that time, she started to seem excited about it.She went to_____27_____the flowers out of the water, and I explained, “You’d better leave the flowers there until the person_____28_____.”At that time, I thought she was_____29_____surprised and happy, because it might be her first time to meet a customer like me. I_____30_____for the flowers, said goodbye, and walked into the station.How wonderful the day was!16．A．bus B．train C．planeD．underground17．A．when B．before C．while D．after18．A．for B．at C．up D．into19．A．tickets B．snacks C．fruits D．flowers20．A．decide B．follow C．change D．praise21．A．or B．but C．so D．yet22．A．happy B．sad C．proud D．nervous23．A．customer B．visitor C．passenger D．stranger24．A．often B．never C．usually D．seldom25．A．plan B．time C．chance D．promise26．A．However B．Whatever C．Whenever D．Wherever27．A．take B．put C．carry D．make28．A．leaves B．goes C．appears D．stands29．A．between B．from C．among D．beyond30．A．prepared B．asked C．cared D．paid Yusra Mardini, one of the 29 refugee(难民) athletes chosen to compete at the Tokyo Olympics, has managed to prove the tenacity(坚韧) of human spirit.Before her life took a(n) ____31____ turn, Mardini grew up in Syria, a beautiful country facing great ____32____. It wasn’t until she was 17 that she and her sister decided to leave behind their country for a better ____33____. The two made their way to Germany in hopes of ____34____ a new life.On the last leg of their ____35____, as Mardini recalls, they ____36____ a small rowboat but the motor stopped working. For over three hours, the sisters swam ____37____ alongside the boat in freezing Mediterranean waters, working to keep the boat ____38____, which was carrying 20 people, until they reached their destination ____39____.Today, Mardini is a _____40_____ because of her bravery. At 19, she was appointed as a Goodwill Ambassador for the UN Refugee Agency but her _____41_____ don’t end there. The Olympian continues to be _____42_____ about refugees and a year after her_____43_____ in Germany, she was _____44_____ to compete at the 2016 Olympics in Rio for the women’s 100m swim.“When I _____45_____, I am not only fighting for my country, I’m fighting for the_____46_____ around the world, _____47_____ to keep their passions alive just as I did. My aquatic(水上的) _____48_____ have saved my life in more ways than one,” said Mardini.“I know that I am not carrying my country’s flag, but I am carrying the Olympic flag which _____49_____ the whole world. I am standing for people beyond _____50_____,” shesaid.31．A．natural B．unnecessary C．unexpectedD．impossible32．A．privilege B．trends C．hardshipsD．discrimination33．A．education B．future C．employer D．company34．A．starting B．defending C．accepting D．describing35．A．journey B．program C．schedule D．effort36．A．watched B．built C．boarded D．drew37．A．happily B．excitedly C．desperately D．easily38．A．steady B．tight C．clean D．separate39．A．secretly B．safely C．gradually D．frequently40．A．hero B．participant C．doctor D．coach41．A．chances B．titles C．adventuresD．accomplishments42．A．crazy B．concerned C．cautious D．curious43．A．arrival B．failure C．successD．involvement44．A．meant B．forced C．reminded D．invited45．A．work B．graduate C．struggle D．compete46．A．hungry B．disabled C．homelessD．unemployed47．A．asking B．hurrying C．promising D．battling48．A．targets B．talents C．tools D．dreams49．A．signals B．informs C．encourages D．represents50．A．control B．borders C．reach D．limits Many nursing homes all over the world are locked down to protect their residents from the COVID-19. Group-f is a ___51___ company in Belgium, whose employees wash the outsides of tall buildings, using platforms that are lifted by cranes (起重机). When the COVID-19 hit Belgium, Group-f’s business ___52___ . The cranes sat ___53___ . But one day, company manager Bosch saw a man standing on the ___54___ and shouting up to his mother who was looking down ___55___ from her window on the third floor of a nursinghome. This gave Bosch a perfect___56___ .Bosch realized he could put the cranes to good use. Ever since, he has been ___57___ them to nursing homes. There, a family can ___58___ a platform that a crane operator will lift up to the window of a loved one.Eve Putseys came to see her 88-year-old aunt, who lives in La Cambre, a nursing home. Before she___59___ the platform, Putseys didn’t know what to expect. “It’s been seven long weeks that I haven’t been ___60___ to see her,” she said. But when Putseys returned to the ground, she was ___61___. “I finally got to see her. She looked very happy to see me,” she said.Officials at La Cambre helped organize the crane-operated ___62___ . “It’s been hard work but quite ___63___ ,” director Thibaut Chevrier says. Bosch ___64___ that operating the machines costs his company money. But he has no ___65___ . “It’s a great honor to help people,” he says.51．A．travel B．design C．building D．cleaning52．A．slowed down B．broke out C．fell back D．knocked down53．A．unpacked B．unnoticed C．unused D．untouched54．A．platform B．ground C．window D．crane55．A．secretly B．proudly C．cautiously D．tearfully56．A．chance B．idea C．dream D．memory57．A．hiring B．sending C．employingD．accompanying58．A．stand on B．set up C．return to D．head for59．A．got B．selected C．landed D．exchanged60．A．determined B．willing C．amused D．able61．A．smiling B．moving C．worrying D．waiting62．A．voyage B．visit C．tour D．adventure63．A．unnecessary B．natural C．practical D．skeptical64．A．anticipates B．responds C．acknowledges D．realizes65．A．anxieties B．promises C．excuses D．regretsI am not sure how many years ago it was. I was in the mood for ___66___. Then I noticed my ___67___ record player in the corner. I ___68___ and dusted off its top.I pulled out an old record of my Mom’s that my Dad had ___69___ me after she passed away. I turned on the record player. Then a ___70___ music from my childhood started to play.The beautiful songs I grew up on ___71___ started to stir (打动) my soul. I ___72___ the music within coming out of me. It was like Mum was saying, “This is how life is___73___ to be!”These days all of my music is on CD’s. My daughter says I am behind the ___74___. She says I should throw them away, ____75____ new smart phone, and ____76____ all the music I want. But instead I think I will dust off those old ____77____ again, put them on that record player, and sing and dance along. I will remember Mom and____78____ her for the music inside me.We all have music within us just waiting to get out. Don’t let your music die within you then. Share your____79____ with the world. And don’t forget to ____80____ a little too.66．A．travel B．food C．music D．work67．A．ancient B．new C．current D．broken68．A．moved in B．walked over C．turned around D．opened up69．A．informed B．reminded C．given D．taught70．A．comfortable B．classic C．traditional D．sweet71．A．frequently B．slowly C．finally D．exactly72．A．felt B．heard C．hoped D．imagined73．A．required B．arranged C．scheduled D．supposed74．A．scenes B．fashions C．times D．history75．A．buy B．take C．sell D．borrow76．A．provide B．promote C．produce D．download77．A．reports B．radios C．records D．rewards78．A．blame B．excuse C．forgive D．thank79．A．kindness B．song C．idea D．comment80．A．dance B．benefit C．skip D．smile “I just don’t know what my mission in life is!” a friend told me. Her word ___81___ an old memory in me.As a young dad, I was ___82___ just to get by. I was getting a few days’ work as a___83___ teacher. Then near the end of the school year I got worried about the summer to___84___ and the lack of work it would bring. The class had a bad ___85___ of summer break fever too. Students were ___86___ their seats, talking in class and not paying attention to anything I said. ___87___, it was time for a break and I was as happy as they were to get outside the hot classroom. I watched them run and play and ___88___ it would wear them out so the afternoon wouldn’t be as ___89___ as the morning had been on me. It was then, however, that a little girl ran up to me. She had a handful of freshly ____90____ wild flowers. She reached a daisy out to me and said, “This is for you, Mr. Mazzella.” In that second I felt a(n) ____91____ I hadn’t felt all day. I smiled and thanked her for her gift as she ____92____ happily away.You see, in that ____93____ that little girl had completed a moment of her mission here on Earth. Every single thing we ____94____ is a part of our mission. It is a lifelong ____95____ too, so stop worrying about your mission.81．A．broke B．implied C．got D．awakened82．A．moving B．praying C．struggling D．working83．A．substitute B．practice C．senior D．family84．A．relieve B．come C．focus D．end85．A．case B．mistake C．memory D．way86．A．packing up B．bouncing off C．sitting on D．puttingback87．A．Guiltily B．Actually C．Casually D．Finally88．A．knew B．decided C．hopedD．guaranteed89．A．tough B．fixed C．dependent D．easy90．A．bought B．picked C．decorated D．delivered91．A．urge B．need C．interest D．joy92．A．slipped B．passed C．skipped D．turned93．A．regard B．spot C．silence D．instant94．A．explore B．need C．do D．learn95．A．process B．devotion C．respect D．loveI understand why people say experience counts. However, when it comes to finding new solutions to problems, ___96___ can be an advantage. Not being ___97___ by conventional thinking frees me up to think differently.I became an engineer ___98___. Despite completing a college course to teach nursery school, I soon ___99___ to focus on math. It was a ___100___ decision to leave teaching and pursue my fast-growing ___101___ for math. But with some guidance from a university professor, my education took another ___102___ and I graduated with a degree in engineering.I realized my early lack of experience could be a(n) ___103___. Being a newcomer left me ___104___ to ask “stupid” questions. The answer was ____105____ to more experienced members of the team. The people surrounding me were happy—once I had ____106____ the courage—to let me ____107____ them and learn from them.The team spirit was infectious (有感染力的). My questions were not ____108____ as stupid by colleagues; ____109____ they helped me look at problems from a different____110____ and consider new approaches.Most inventions begin with a(n) ____111____. When our team sets out to invent something new, we discuss the problem and the possible ways to ____112____ it. It’s a team effort and this is ____113____ in patent applications-they represent the team’s ideas, regardless of who ____114____ suggested them. Asking unusual questions helped me develop an inventor’s mind, one that is unconstrained (不受限制的) by standard ways of ____115____ problems.96．A．inflexibility B．inexperience C．inabilityD．inaccuracy97．A．stimulated B．persuaded C．reserved D．limited98．A．on purpose B．on occasion C．by accident D．by order99．A．submitted B．switched C．failed D．forgot100．A．tough B．stupid C．collectiveD．necessary101．A．hate B．panic C．passionD．confidence102．A．credit B．beating C．risk D．turn103．A．trouble B．plus C．weaknessD．exception104．A．free B．discouraged C．bored D．frank105．A．deaf B．wrong C．obviousD．traditional106．A．taken up B．torn up C．used up D．built up107．A．encourage B．clarify C．question D．suspect108．A．perceived B．appointed C．learned D．used109．A．instead B．moreover C．thereforeD．otherwise110．A．document B．angle C．introduction D．country111．A．discussion B．argument C．assumption D．problem112．A．hide B．handle C．admire D．discover113．A．hatched B．engaged C．lost D．reflected114．A．originally B．accidentally C．hopefully D．politely115．A．creating B．developing C．approaching D．experiencing When I moved to a new neighborhood, it was hard. What's worse, we had to ___116___ our school. When you move halfway through the school year, your classmates have already ___117___ their groups and their friendships. It's ___118___ to break in. The only thing that made me feel ___119___ was that the school was nearer to my grandparent's house.One day a boy ___120___ by when my brother and I were playing. He looked___121___ and nodded to us on an orange bike. We stepped out of his ___122___, but none of us spoke to each other. We didn't think we would ___123___ him again.However, a few days later, we saw him again. This time he ___124___. We found out he was a grade below us. It ___125___ a lot that he stopped to say hello to us. No one from our new school had ___126___ made an effort to befriend us, and we were shy and didn't know how to___127___.The boy made a great effort to ___128___us. He began asking us to go on bike rides. And we slowly___129___ meeting other kids in the neighborhood.Our new ___130___ showed us how to use kindness towards a new kid. He ___131___ me to believe in myself and my ___132___ to make new friends. It was just a matter of ___133___. To this day, whenever I see an orange bike I ___134___. If it hadn't been for the kid on the bike I don't think I would have developed the ___135___ that I've been blessed with.116．A．attend B．build C．change D．consult117．A．formed B．joined C．recognized D．helped118．A．harmful B．hard C．necessary D．fun119．A．energetic B．comfortable C．surprised D．free120．A．rode B．ran C．drove D．walked121．A．determined B．helpless C．funny D．kind122．A．reach B．control C．way D．place123．A．accept B．bother C．forgive D．meet124．A．left B．stopped C．quit D．agreed125．A．meant B．proved C．discovered D．hurt126．A．constantly B．mainly C．aeeordingly D．really127．A．make up B．turn up C．reach out D．start out128．A．praise B．include C．remindD．appreciate129．A．avoided B．missed C．started D．risked130．A．kid B．teacher C．neighbor D．friend131．A．taught B．caused C．requested D．warmed132．A．ability B．wish C．plan D．effort133．A．time B．money C．lifeD．communication134．A．glare B．sigh C．smile D．hesitate135．A．habits B．friendships C．pictures D．exercises It was my first year teaching in a special needs classroom. I wasn’t sure what to___136___ at our annual Special Olympics. My students had a range of ___137___, from mild learning disabilities to severe brain diseases.Mark was one with the latter, limited to a ___138___ However, he ___139___ greeted everyone with huge smiles. His classmates loved him and often took their time to ___140___ his participation in group activities, especially Mike, Andy and Lucas, all ___141___ at sports. Mark imagined being like them. Watching and cheering for their elegant ___142___ on the playground seemed to fill him with ___143___.The big day came at last and the final ___144___ was the 400-meter race. Everyone was invited to ___145___ according to their own ability. Mike, Andy and Lucas ___146___ to prove who the best athlete was. But when the exhausted three reached the finish line they___147___ and turned to look behind them. At the back of the crowd, determined not to be left behind, was Mark, ___148___ on the track in his wheelchair with half the distance left to___149___—all his classmates were outdistancing him. Looking at each other, a ___150___ thought passing between them. Slowly, they jogged ___151___ towards their friend, surrounded Mark and kept pace, ___152___ him on as he had done for them before.The progress was ___153___, but eventually they crossed the finish line together to the___154___ cries of their teachers and classmates. I came to understand what makes the Special Olympics so ___155___. Years later, I’m still cheering them on.136．A．teach B．expect C．describe D．consider137．A．challenges B．grades C．knowledge D．wishes138．A．classroom B．playground C．wheelchair D．library139．A．never B．seldom C．sometimes D．always140．A．make sure of B．figure out C．call for D．holdback141．A．poor B．satisfied C．excellentD．disappointed142．A．behavior B．conversation C．sportswearD．movement143．A．anger B．wonder C．thanks D．hope144．A．result B．event C．ceremonyD．celebration145．A．participate B．welcome C．watch D．observe146．A．went on B．moved on C．took off D．showedoff147．A．remained B．struggled C．rested D．paused148．A．afraid B．alone C．alive D．awake149．A．cover B．find C．keep D．run150．A．strange B．normal C．creative D．silent151．A．off B．down C．back D．away152．A．pushing B．moving C．cheering D．driving153．A．worthwhile B．slow C．exciting D．painful154．A．enthusiastic B．surprised C．doubtful D．pleasant155．A．interesting B．professional C．challenging D．extraordinary Carl Allamby grew up in a poor African American neighborhood. As a child, pursuinghis dream is ____156____ but easy for him. His school didn’t offer the advanced science classes that might have led him on the path to ____157____. Even it had, doing well in school could prove dangerous. There were often times they would be attacked for____158____ the class. As a result, he ____159____ the thought of becoming a doctor.At age 19, he started working alone in a garage. Over the years it had ____160____ into two shops, but Carl was ____161____ for something more. So at 34, he went for his bachelor’s degree in business management and he was ____162____ he had to take biology to get his degree.It turned out that it was the ____163____ thing to have happened. Biology class reawakened a childhood dream he had ____164____ somewhere deep within himself. Determined to accomplish his dream, he skipped business ____165____ the science classes for a second career. “It was ____166____ to become a doctor at around 50. I would____167____ become a nurse, or a physician assistant.” Carl reasoned.But Carl’s chemistry professor ____168____ him after class one day and talked him out of that thought.He was right. Carl did well in all his courses. And so in 2015, he cut ____169____ with his past, selling his two shops and everything in them. In 2019, at 47, Carl Allamby became Carl Allamby, MD．The world may have ____170____ him around once or twice, but it didn’t defeat him.“How many people can do something so ____171____ at such a late stage in their life?” he says. “I fit so many demographics (人口统计数据) that ____172____ you shouldn’t be a doctor. ____173____ it’s because of my age, my race, my upbringing, or my career, these are all good ____174____ suggesting I shouldn’t be here. And ____175____, here I am.”156．A．nothing B．everything C．anythingD．something157．A．business B．physics C．medicine D．biology158．A．topping B．skipping C．missing D．resisting159．A．wrote down B．set aside C．came up with D．got downto160．A．grown B．zoomed C．narrowed D．shrunk161．A．hopeful B．sorry C．desperate D．grateful162．A．warmed B．informed C．convinced D．advised163．A．very B．least C．last D．best164．A．lost B．hidden C．made D．lived165．A．in praise of B．in memory of C．in need of D．in favorof166．A．cool B．crazy C．worthwhileD．admirable167．A．however B．indeed C．insteadD．otherwise168．A．spotted B．stopped C．scolded D．seized169．A．ties B．profits C．businessD．memories170．A．dropped B．kissed C．swallowed D．knocked171．A．ridiculous B．brand-new C．ambitious D．straight-forward172．A．say B．write C．report D．calculate173．A．If B．When C．Whether D．While174．A．reasons B．tips C．proofs D．examples175．A．so B．yet C．then D．still After spending the last two years terrified of getting Covid-19, last month our three-year-old daughter-too young to be vaccinated-got sick. There was an____176____in her Pre-K classroom, so as soon as she got a temperature, we did an at-home test.We spent a few____177____nights fighting to bring her fever down as my kid coughed and struggled with congestion. Her doctor told us to only take her to the hospital if she had trouble breathing. The biggest “____178____” I had to help our little warrior was over-the-counter medicine to reduce her fever.____179____my little girl has now recovered, I can't stop thinking about how, as a country, the US just can't seem to____180____ prioritize the well-being of children. How could we so excitedly tout (吹捧) having a vaccine when it doesn't____181____ the young kids? As kids across the country return to school without clear and accessible testing measures____182____, how can anyone be claiming to put children’s safety or protection first?At this point in the pandemic, the health of our children-not of our businesses-should beput first. For starters, that means we need a larger____183____of tests and clear, consistent rules for isolating if ____184____or infected.Even in the midst of the nightmare of my toddler testing____185____, I wasso____186____we had at-home tests. But the only reason we had them was because my husband had thought _____187_____about our need for testing kits and masks during the holiday season. We were saved by pure____188____while many people have struggled to find tests. That is____189____.As we enter year three of the pandemic, I have a____190____ for the world’s richest democracy: Let’s prioritize children in 2022-their health and their rights because they’re the ones who have the highest price to pay.And they’re already paying the bill.176．A．isolation B．injection C．outbreak D．occasion177．A．upset B．sleepless C．pleasant D．enduring178．A．weapon B．tool C．treatment D．method179．A．Unless B．But C．Since D．While180．A．easily B．barely C．hurriedlyD．effectively181．A．apply B．take C．consider D．include182．A．in place B．in line C．in order D．in sight183．A．availability B．capability C．flexibilityD．popularity184．A．caught B．exposed C．injected D．touched185．A．relative B．addictive C．active D．positive186．A．depressed B．nervous C．grateful D．excited187．A．aloud B．highly C．ahead D．little188．A．joy B．terror C．luck D．surprise189．A．unacceptable B．uncontrollable C．undeniableD．unavoidable190．A．change B．proposal C．reform D．viewI am Russian, but I live in Kansas now. It was my husband, John, that ___191___ me here. I work in a store, where my ___192___ smile and pronounce my name so sweetly as though my mom was ___193___ me. However, in my hometown people sometimes believe asocial smile is not ___194___.Last year, John ___195___ me to go see my mom back in Russia. My manager even gave me a month off for the ___196___. I bought a plane ticket and ___197___ my suitcase. Then came an unexpected event. My ___198___ became grey as I couldn’t go back.A few weeks later, my colleague, Donna, asked me, “So what’s happening with your trip to Russia?” I told her that I had to ___199___ it and that I wouldn’t be able to see my mom this year. Donna didn’t say anything at first. Then she put on a big ___200___, “Well, you can come and see my mom!”Oh! That’s what my husband always says when he’s ___201___ for words. I honestly don’t know whether I would ___202___ the same to someone in need of a mother’s warmth, but my new people would ___203___ do it. Because of the virus, we shouldn’t hug friends, but we can hug someone’s heart. That’s how my heart feels at that moment: ___204___. So, yes, believe me, their smile is ___205___.191．A．ordered B．promised C．brought D．surprised192．A．co-workers B．teachers C．receptionistsD．neighbours193．A．accepting B．comparing C．expecting D．calling194．A．sensitive B．typical C．spiritual D．genuine195．A．forced B．advised C．drove D．followed196．A．trip B．study C．work D．language197．A．searched B．packed C．forgot D．imagined198．A．hair B．suit C．mood D．brain199．A．handle B．record C．assume D．cancel200．A．smile B．show C．weight D．action201．A．on duty B．at a loss C．in no case D．in danger202．A．award B．offer C．owe D．trouble203．A．hardly B．carefully C．surely D．slightly204．A．cheated B．felt C．understood D．hugged205．A．native B．healthy C．harmless D．sincere Do you remember how you felt the first time you rode bike?What about your first heartbreak? ____206____ moments and the emotions they arouse can resonate in our minds for decades, powerfully shaping who we are as individuals. But for those who experiencesevere trauma (创伤), such painful memories can leave people with life-changing mental conditions. So, what if traumatic memories did not have to cause so much ____207____ ? For now, the work is happening in mice.Neuroscientists usually define a singular memory as an engram--a physical change in brain tissue ____208____ a particular recollection. While at MIT in 2013, Steve Ramirez of Boston University and his research partner Xu Liu had a breakthrough: They were able to target the cells that ____209____ one engram in a mouse's brain and then implant a false memory. In their work, mice ____210____ in fear to a particular stimulus even when they had not been conditioned in advance.In their current work, Ramirez and his colleagues are investigating whether____211____ memories can be “overwritten" by positive ones. In their experiments, positive memories are created by putting male mice in cages with female ones for an hour, and negative memories are created by putting the mice in cages that deliver brief foot shocks. After a surgical operation on the mice, the researchers find that ____212____ positive memories while mouse is in a cage makes it less fearful. They think that this memory "retraining" may be helping to ____213____ some of the mouse's trauma. ____214____ , it is unclear whether those original fear memories are completely lost or just suppressed (抑制)._____215_____ Ramirez's team stresses that their work in mice is preliminary (初步的), they see treatment potential for humans down the road. Those suffering from PTSD or depression could have their memories _____216_____ , for instance, so that they don't have a strong _____217_____ response to painful recollections.If it's one day possible to alter human memory, who should be allowed to receive that treatment? And would the _____218_____ system be at a disadvantage if key witnesses and victims cannot remember a crime? These are questions New York University bioethicist (生物伦理学家) Arthur Caplan says are worth thinking about before the technology is ready for human clinical settings.As neuroscientists progress with their research, they say these _____219_____ issues are being taken into account. Ramirez sees the idea of _____220_____ memories as neither good nor bad. Like water, it just depends on how you use it.206．A．Forgettable B．Memorable C．SustainableD．Believable207．A．dignity B．struggle C．pain。
