单片机课程设计实验报告
课程名称:心形流水灯学院:电子与物理通信学院专业:生物医学工程
姓名:王博秦显富万立强指导老师:郑娟娟
目录
一、总体设计 (2)
二、硬件设计 (4)
三、设计步骤 (7)
四、软件设计 (11)
五、软件调试 (16)
六、心得体会 (17)
七、参考文献 (18)
总体设计思路
1设计思路
本课题使用AT89C51单片机时无须外扩存储器。因此，本流水灯实际上就是一个带有八个发光二极管的单片机最
小应用系统，即为由发光二极管、晶振、复位、电源等电路和必要的软件组成的单个单片机。
如果要让接在P1.0口的LED1亮起来，那么只要把P1.0口的电平变为低电平就可以了；相反，如果要接在P1.0口
的LED1熄灭，就要把P1.0口的电平变为高电平；同理，接在P1.1～P1.7口的其他7个LED的点亮和熄灭的方法同LED1。因此，要实现流水灯功能，我们只要将发光二极管LED1～LED8依次点亮、熄灭，8只LED灯便会一亮一暗的做流水灯了。同样的道理，可以让8个灯左移点亮，全亮、全灭。
在此我们还应注意一点，由于人眼的视觉暂留效应以及单片机执行每条指令的时间很短，我们在控制二极管亮灭的时候应该延时一段时间，否则我们就看不到“流水”效果了。
2.原件清单
二、硬件设计
1AT89C51
1.芯片（AT89C51）
1）主要特性：
与MCS-51兼容
4K字节可编程闪烁存储器
寿命：1000写/擦循环
数据保留时间：10年
全静态工作：0Hz—24Hz
三级程序存储器锁定
128*8位内部RAM
32可编程I/O线
5个中断源
可编程串行通道
低功耗的闲置和掉电模式
片内震荡器和时钟电路
2）管脚说明：
①电源引脚
Vcc（40脚）：典型值＋5V。
Vss（20脚）：接低电平。
②外部晶振
XTAL1、XTAL2分别与晶振两端相连接。
③输入输出口引脚：
P0口：I/O双向口。作输入口时，应先软件置“ 1”。
P1口：I/O双向口。作输入口时，应先软件置“ 1”。
P2口：I/O双向口。作输入口时，应先软件置“ 1”。
P3口：I/O双向口。作输入口时，应先软件置“ 1”。
④控制引脚：
RST、ALE/-PROG、-PSEN、-EA/Vpp 组成了MSC-51的控制总线。
RST（9脚）：复位信号输入端（高电平有效）。
ALE/-PROG(30脚）：地址锁存信号输出端。
第二功能：编程脉冲输入。
-PSEN（29脚）：外部程序存储器读选通信号。
-EA/Vpp(31脚）：外部程序存储器使能端。
第二功能：编程电压输入端（+21V）。3）AT89C51单片机的P口特点：
P0口：是一个8位漏极开路输出型双向I/O 端口。作为输出端口时，每位能以吸收电流的方
式驱动8 个TTL输入，对端口写1时，又可作高阻抗输入端用。在访问外部程序或数据存储器时，它是时分多路转换的地址（低8位）/数据总线，在访问期间将激活内部的上拉电阻。
P1口：P1口是一个带有内部上拉电阻的8位双向I/O端口。P1口的输出缓冲器可驱动（吸
收或输出电流方式）4个TTL输入。对端口写1
时，通过内部的上拉电阻把端口拉到高电位，这
时可作输入口。P2口作输入口使用时，因为内部
有上拉电阻，那些被外部信号拉低的引脚会输出
一个电流（Iil）。
P2口：P2口是一个带有内部上拉电阻的8位双向I/O端口。P2口的输出缓冲器可驱动（吸
收或输出电流方式）4个TTL输入。对端口写1
时，通过内部的上拉电阻把端口拉到高电位，这
时可作输入口。P2口作输入口使用时，因为内部
有上拉电阻，那些被外部信号拉低的引脚会输出
一个电流（Iil）。在访问外部程序存储器时和
16位外部地址的外部数据存储器（如执行MOVX @DPTR）时，P2口送出高8位地址。在访问8位地址的外部数据存储器（如执行MOVX @RI）时，P2口引脚上的内容（就是专用寄存器(SFR)区中的P2寄存器的内容），在整个访问期间不会改变。
P3口：P3口是一个带有内部上拉电阻的8位双向I/O端口。P3口的输出缓冲器可驱动（吸收或输出电流方式）4个TTL输入。对端口写1时，通过内部的上拉电阻把端口拉到高电位，这时可作输入口。P3口作输入口使用时，因为内部有上拉电阻，那些被外部信号拉低的引脚会输出一个电流（Iil）。
2、系统框图
3、程序框图
三、设计步骤
1硬件设计
硬件系统是指构成微机系统的实体和装置，通常由运算
器、控制器、存储器、输入接口电路和输入设备、输出接口
电路和输出设备等组成。单片机实质上是一个硬件的芯片，
在实际应用中，通常很难直接和被控对象进行电气连接，必
须外加各种扩展接口电路、外部设备、被控对象等硬件和软
件，才能构成一个单片机应用系统。本设计选用以AT89S51
单片机为主控单元。显示部分：8个LED灯循环亮灭。
2单片机时钟电路
时钟电路用于产生单片机工作所需要的时钟信号，单片机本身就是一个复杂的同步时序电路，为了保证同步工作方式的实现，电路应在唯一的时钟信号控制下严格地按时序进行工作。
在MCS-51芯片内部有一个高增益反相放大器，其输入端为芯片引脚X1，输出端为引脚X2，在芯片的外部跨接晶体振荡器和微调电容，形成反馈电路，就构成了一个稳定的自激振荡器。此电路采用12MHz的石英晶体。时钟电路如下图：
图2
3复位电路
电阻的作用是用于上电复位的，VCC以上电，由于电容两端电压不能突变，所以RST上为高电平，然后电容放电，RST就为低电平了，还可以用手动复位，此电路应用自动复位。
图3
4控制电路
控制电路用于控制工作电路的工作情况，根据要求来控制电路，本电路的控制电路用来控制流水灯的工作情况，当按下1、2、3、4各个开关时，电路具有左移、右移、全亮、全没的功能，具体的控制电路如下：
图4
5.数码管显示电路
数码管用于显示当前流水灯工作于哪个状态，属于共阴型数码管，
1 到5对应的码分别为00101000B,11001101b ,01101101b,00101011b,01100111B
6工作电路
1）工作电路就是根据总的电路的指令，来反应工作情况。本电路的流水灯电路具体的如下：
图5
2）根据各个模块的功能及他们的信号传输，连接电路如下：
图6
四、软件设计
1设计要求
本系统的功能就时实现流水灯的循环点亮，主要有五个功能，第一，按下第一个按钮，16个彩灯闪烁，按下第二个，彩灯间隔闪烁，按下第三个，四个灯循环右移，按下第四个，六个彩灯循环左移，按下第五个键，两个灯循环右移。彩灯用16个发光二极管代替。电路具有的控制彩灯点亮右移、左移、全亮及全灭的功能用按键切换彩灯状态，彩灯两点移动时间间隔为150毫秒。
2.程序流程图
2.程序设计
ORG 0000H
LJMP MAIN
ORG 0030H
MAIN: MOV R0,#20
JNB P0.0,LOOP1 ;判断是否有键按下
JNB P0.1,LOOP2
JNB P0.2,LOOP3
JNB P0.3,LOOP4
JNB P0.4,LOOP5
AJMP MAIN ;若没键按下返回重新判断
LOOP1:CLR A
MOV R0,#20
S0:
MOV B,#028H;数码管显示1
MOV P2,B
LCALL DELAY ;调用延时
MOV P1,A
MOV P3 ,A ;闪烁
LCALL DELAY ;调用延时
CPL A ;取反
MOV R4,P0
CJNE R4,#0FFH,main ;判断是否有键按下，若有返回主程序
DJNZ R0,S0
MOV R0,#20 ;循环20次
LOOP2: MOV A,#10101010B
S1:
MOV B,#11001101b ;数码管显示2 MOV P2,B
LCALL DELAY;间隔闪烁
MOV P1,A
MOV P3,A
LCALL DELAY
CPL A
MOV R4,P0
CJNE R4,#0FFH,main
DJNZ R0,S1
MOV R0,#20
LOOP3: MOV A,#00111111b
S2:
MOV B,#01101101b;数码管显示3 MOV P2,B
LCALL DELAY;两个灯循环右移
MOV P1,A
MOV P3,A
RR A
LCALL DELAY
MOV R4,P0
CJNE R4,#0FFH,main DJNZ R0,S2
MOV R0,#20
LOOP4:MOV A,#11000111B
S3: MOV B,#00101011b ;数码管显示4 MOV P2,B
LCALL DELAY;三个灯循环左移
MOV P1,A
MOV P3,A
RL A
LCALL DELAY
MOV R4,P0
CJNE R4,#0FFH,main1
DJNZ R0,S3
MOV R0,#20
LOOP5: MOV A,#11111110B
S4: MOV B,#01100111b ;数码管显示5 MOV P2,B
LCALL DELAY ;一个灯循环左移
MOV P1,A
MOV P3,A
RL A
LCALL DELAY
MOV R4,P0
CJNE R4,#0FFH,main1 DJNZ R0,S4
LJMP LOOP1
DELAY: MOV R1,#150；延时150毫秒 DELAY1:MOV R3,#0FAH
LOOP8:MOV R7,#70H
DJNZ R3,LOOP8
DJNZ R1,DELAY1
RET
MAIN1:LJMP MAIN
RET
MAIN2:LJMP MAIN
RET
END ；程序结束
五、软件调试
软件调试一般分为以下四个阶段：
1、编写程序并查错，修正后显示“0错误，3警告”，如下图所示；
2、在汇编语言的编译系统中编译源程序
3、对程序进行编译连接，并及时发现程序中存在的错误；
4、改正错误。
在软件调试过程中，对出现的错误进行了认真的分析和修改，多次调试成功后，能够很好的达到既定的设计效果。
此系统可以改进为可以通过对开关的调节来控制流水灯电路具有控制彩灯点亮右移、左移、全亮及闪烁等功。
六，心得体会
经过一段时间的努力，我们顺利的完成了这次单片机课程设计，本次课程设计由秦显富同学负责编写程序，软件部分，万立强同学负责硬件部分，焊电路板，王博同学负责总结写报告。这其中经历了很多的困难，但我们最终都一一克服了。最重要的是，我们通过这次课程设计得到了很大的锻炼，使学到的只是得到了充分的应用。本次课
程设计加强了我们团队合作精神，使我们受益匪浅，更加明确了自己奋斗的方向。
最后要感谢实验室的指导老师，没有你们的帮助，也没有我们的成果，谢谢老师。
七，参考文献
[1]杨乐平李海涛编labVIEW程序设计与应用,电子工业出版社.2005,1
[2]阎石编著.数字电子技术基础.高等教育出版社.2003.
[3] 雷振山等,LabVIEW 8.2基础教程.中国铁道出版社.2008
[4]贾伯年、俞朴编著.传感器技术.东南大学出版社.2005
[5]程佩青.数字信号处理.北京:高等教育出版社.1997
[6]华成英编著.模拟电子技术基础.高等教育出版社.2001
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c. tightening d. shortening 题目5 正确 获得1.0分中的1.0分 Flag question 题干 is considered to be ________ the other students in her class. 选择一项： a. as intelligent as b. intelligent as well c. the most intelligent d. less intelligent 题目6 正确 获得1.0分中的1.0分 Flag question 题干 ______ his examination of the patient, the doctor wrote out a prescription. 选择一项： a. Having been finished b. Finished c. Having finished d. Finishing
新大学英语（2）第三次网络作业 (三次网络作业的平均成绩占期末考试总评成绩30%，作业一经批改评分，将不能修改；此次作业完成后应交到“在线作业”一栏本次作业界面中；作业必须按最后一页答卷表格格式作答，并且不要以附件形式缴交) 一．阅读： I arrived in the United States on February 6,1966, but I remember my first day here very clearly. My friend was waiting for me when my plane landed at Kennedy Airport at three o’clock in the afternoon. The weather was very cold and it was snowing, but I was too excited to mind. From the airport, my friend and I took a taxi to my hotel. On the way, I saw the skyline（轮廓）of Manhattan （曼哈顿）for the first time and I stared in astonishment at the famous skyscrapers and their man-made beauty. My friend helped me unpack at the hotel and then left me because he had to go back to work. He promised to return the next day. Shortly after my friend had left, I went to a restaurant near the hotel to get something to eat. Because I couldn’t speak a word of English, I couldn’t tell the waiter what I wanted. I was very upset and started to make some gestures(手势), but the waiter didn’t understand me. Finally, I ordered the same thing the man at the next table was eating. After dinner, I started to walk along Broadway until I came to Times Square with its movie theatres, neon lights（霓虹灯）, and huge crowds of people. I did not feel tired, so I continued to talk around the city. I wanted to see everything on my first day. I knew it was impossible, but I wanted to try. When I returned to the hotel, I was exhausted（筋疲力尽）, but I couldn’t sleep because I kept hearing the fire and police sirens（警笛声）during the night. I lay awake and thought about New York. It was a very big and interesting city with many tall buildings and big cars, and full of noise and busy people. I also decided right then that I had to learn to speak English. 1. On the way to his hotel, the writer___C___. a. was silent all the time
2014年4月份考试大学英语（3）第三次作业 一、填空题（本大题共10分，共 5 小题，每小题 2 分） 1. Negative student''s ______ (respond) to online learning are also due to time factors, particularly for students with part-time or full-time jobs. 2. The meeting began ______ (punctuality) at nine o’cl ock. 3. In the United States, all children between the ages of 5 and 18 must ______ (attendance) school. 4. The reporter checked with a variety of sources to guard against ______ reports. (accurate ) 5. Only a few of us could ______ his statement, because it was too profound. (comprehension) 二、翻译题（本大题共30分，共 5 小题，每小题 6 分） 1. Many people fail in learning a language because they lose the belief in themselves as learners. 2. Just as we know, it is quite common for college students in Western countries to pay their way through college 3. 既然你有电脑可用，为什么还用手去计算这样大的数目呢？ 4. 周末我喜欢与父母一起呆在家里，而我的朋友们却热衷于去那些嘈杂的俱乐部。 5. 我们可以从事各种各样的业余爱好，比如听音乐、看电影、或者跟几个朋友聚一聚 三、作文题（本大题共60分，共 3 小题，每小题 20 分） 1. For this part, you are allowed thirty minutes to write a composition on the topic Work and Leisure in no less than 100 words. You may begin your composition with “People generally believe that a life without leisure is really terrible.” Remember to write clearly. 2. Instructions:建议你在30分钟内，根据下面所给的题目和提纲用英语写出一篇不少于80词的短文。你特别喜欢的食物；2．你喜欢的理由。 3. Instructions:建议你在30分钟内，根据下面所给的题目和提纲用英语写出一篇不少于80词的短文。 1.你在英语学习中遇到什么困难； 2.你如何克服这些困难。 答案： 一、填空题（10分，共 5 题，每小题 2 分） 1.
大学英语（1）第三次网络作业 (三次网络作业的平均成绩占期末考试成绩30%，作业一经批改评分，将不能修改；此次作业完成后应交到“在线作业”一栏本次作业界面中；作业必须按最后一页答卷表格格式作答，不要以附件形式缴交) 一、交际用语对话练习：（针对每个对话未完成的部分选择最适当的答案） 1. — Please help yourself to the seafood — _______ a. Thanks, but I don’t like the seafood. b. Sorry, I can’t help. c. Well, seafood don’t suit for. d. No, I can’t. 2. — Can you go to the concert with us this evening? — _______ a. No, I already have plans. b. I’d love to, but I’m busy tonight. c. No, I really don’t like being with you. d. I’m ill, so I shouldn’t go out. 3. —Congratulations! You won the first prize in today’s speech contest. — _______. a. Yes, I beat the others. b. No, no I didn’t do it well. c. Thank you. d. It’s a pleasur e. 4. — Must I take a taxi? — No, you _______. You can take my car. a. had better to
大学英语（1）第三次作业 一、填空题（本大题共10分，共 10 小题，每小题 1 分） 1. The pirate (海盗) chief commanded that the prisoners (俘虏) (shoot) ______ . 2. Many years ago, Jim ______ (live) in Paris with his uncle. 3. The wallet ______ (lose) when I was on my way back home. 4. Never mind who told me; that is of no (important) ______ . 5. All of a (suddenly) ______ , she began to laugh. 6. If it hadn't rained last night, the ground (not be) ______ so wet now. 7. Chinese characters ______ (not write) with an alphabet. 8. Oh, excellent. It’s worth (read) ______ a second time. 9. It is very (consider) ______ of you to look after my garden during my absence. 10. It was his intelligence and hard work that (able) ______ him to succeed in his career. 二、翻译题（本大题共30分，共 10 小题，每小题 3 分） 1. The ship is d ue at 2 sharp, but today it’ll be ten minutes late because of the bad weather. 2. If you would like to go to the restaurant on the top floor, please change the elevators at the 15th floor. 3. According to your ad in this morning’s paper, you have an apartment for rent. 4. We have one vacant seat for the 2:40 train because someone cancelled it a couple of minutes ago. 5. We have one vacant seat for the 2:40 train because someone cancelled it a couple of minutes ago. 6. The basic rate for taxis here is about $ 1 each kilometer, but the rate doubles when exceeding 10 kilometers. 7. Please hold the line a moment while I’m putting you through to Mr. Smith’s office. 8. you’ll have to show me your passport or some other identification. 9. I’m sorry to trouble you, sir, but the figures and the words on the cheque do not agree. 10. you’ll have to show me your passport or some other identification. 三、作文题（本大题共60分，共 3 小题，每小题 20 分） 1. 请写一份邀请函，邀请你的老同学参加你们学校的100周年校庆晚会。请具体说明晚会的时间、地点、以及晚会的主要内容和参加者。不得少于80字。 2. This part is to test your ability to do practical writing. You are required to write a letter according to the following instructions given in Chinese. Remember to write the letter on the Composition /
江苏开放大学形成性考核作业 3
英译汉（满分40分）请把下列4句英文翻译成中文。 1. They have been working together for three months and have come to know each other better. 他们已经在一起工作了三个月，已经认识了每一个。 2. What would you like to drink, mineral water or tea? 您想喝什么，矿泉水还是茶？ 3. I read the local newspapers with great interest every evening. 我每天晚上都很感兴趣地阅读当地报纸。 4. My classmates are cleverer than I. 我的同学比我聪明。 写作（满分60分） 要求在30分钟内，根据下面所给的题目用英语写出一篇不少于80词的短文。 Self-learning Self-l earning is a normal part of all effective organizations. It has a special rol e in the life of coll ege and university communities going through processes of accreditation and program review. While Self-l earning is ideally ongoing, it takes on special meaning during an accreditation process. At this point a variety of special resources are usually d evoted to Self-l earning, and a particular effort is mad e to involve all parts of the university community, from trustees and faculty to support staff and stud ents. No singl e source of data is used for self-study as it must examine issues of l earning and university life from a variety of perspectives. Special efforts are also mad e to ensure the integrity of the process because a study that fails to reveal the true character of an institution may be meaningl ess. Toward the end of the process, a team of experts from other institutions visits to examine the institution and its Self-l earning report.
题目1 正确 获得1.00分中的1.00分 未标记标记题目 题干 - Could you give me a helping hand? - _________ - I want to clean my garage. 选择一项： a. Not at all. b. Sure. What can I do for you? 正确 c. Which one? d. How's that. 反馈 正确答案是：Sure. What can I do for you? 题目2 正确 获得1.00分中的1.00分
未标记标记题目 题干 - Hello, I'd like to speak to Mark, please. - __________选择一项： a. This is me. b. This is Mark speaking. 正确 c. It's me here. d. Yes, I'm Mark. 反馈 正确答案是：This is Mark speaking. 题目3 正确 获得1.00分中的1.00分 未标记标记题目 题干 - I'm sorry I'm calling you so late. - __________Okay.选择一项：
a. That's 正确 b. This is c. I'm d. You're 反馈 正确答案是：That's 题目4 正确 获得1.00分中的1.00分 未标记标记题目 题干 - How would you like to mail it? - _______选择一项： a. Thank you very much. b. By air mail, please. 正确 c. I'll be coming. d. Post office is over ther e.
2011年春季学期大学英语（1）第三次作业 一、单项选择题（本大题共30分，共 15 小题，每小题 2 分） 1. It is a nice day to me. Why not ( ) for a picnic? A. go for B. go to C. go out D. go in 2. Don’t worry. It is a ( ) injury, not serious. A. light B. flight C. slight D. eight 3. The workers ( ) the recreational center by the middle of 1999. A. had built B. have built C. built D. build 4. She ( ) quite a lot for such a young age. A. has expensed B. expensed C. experience D. has experienced 5. It is in this university ( ) Prof. Jackson established his famous theory. A. which B. that C. where D. what 6. I gave him the book, but demanded that he ( ) it to me in a week. A. must return B. return C. would return D. returned 7. I’d better check in my luggage quickly ( ) I’d miss my flight. A. and B. so C. or D. to 8. For your never-ending effort, I’m sure you ( )this praise. A. deserve B. serve C. reserve D. conserve 9. There ( ) no money left, we had to change our plan.
大学英语（三）第三次作业（交际英语） 题目1 -- How about going fishing? --____________, I have no patience for that. 选择一项： a. Sorry b. Excuse me c. Apologize d. Pardon 题目2 —How’s the young man? —_______ 选择一项： a. He’s David. b. He’s a doctor. c. He’s twenty. d. He’s much better. 题目3 —Hurry up please, or I’ll be late. —____________. 选择一项： a. Well, it’s alright, sir b. Sorry sir, but the traffic is thick now c. Oh, we are going the right way d. How can you say that, sir? 题目4 －Ted: Hi, Christine. ______________. －Christine: Hi, Ted. I just bought a new camping tent. I can’t wait to use it. 选择一项： a. What’s wrong? b. What’s up? c. What’s on? d. What’s right? 题目5 - Shall we go out for dinner tonight? - _________ 选择一项： a. Thank you, I don't want to. b. Sorry, I have a report to finish. c. Yes, please. d. No, you can't. 题目6 －What day is today?－___________.
QQ2206068659（本人有很多答案需要的米我） 2011年春季学期大学英语（1）第三次作业 一、单项选择题（本大题共30分，共 15 小题，每小题 2 分） 1. It is a nice day to me. Why not ( ) for a picnic? A. go for B. go to C. go out D. go in 2. Don’t worry. It is a ( ) injury, not serious. A. light B. flight C. slight D. eight 3. The workers ( ) the recreational center by the middle of 1999. A. had built B. have built C. built D. build 4. She ( ) quite a lot for such a young age. A. has expensed B. expensed C. experience D. has experienced 5. It is in this university ( ) Prof. Jackson established his famous theory. A. which B. that C. where D. what 6. I gave him the book, but demanded that he ( ) it to me in a week. A. must return B. return C. would return D. returned 7. I’d better check in my luggage quickly ( ) I’d miss m y flight. A. and B. so C. or D. to 8. For your never-ending effort, I’m sure you ( )this praise. A. deserve B. serve C. reserve
2012年9月份考试大学英语（3）第三次作业 一、单项选择题（本大题共40分，共 40 小题，每小题 1 分） 1. If you ( ) that late movie last night, you wouldn’t be sleepy now. A. hadn’t watched B. didn’t watch C. haven’t watched D. wouldn’t have watched 2. Smoking is so harmful to personal health that it kills ( ) people each year than automobile accidents. A. seven more times B. seven times more C. over seven times D. seven times 3. The number of errors ( ) surprising. A. will be B. were C. have been D. was 4. Persian carpets are much dearer than ( ) from Japan. A. what B. those C. that D. them 5. An airliner has ( ) way to taxi before it reaches the end of the runway. A. quite a long B. quite long C. a quite long D. a long quite 6. My brother has just arrived, but I didn’t know he ( ) to see m e until yesterday afternoon. A. come B. came C. was coming D. is coming 7. It’s hard to ( ) everything we did when we were young. A. remind B. remain C. recall D. reunion 8. He bought a new suitcase, ( ) is very high. A. the price of which B. price of which C. which price
第三次在线作业 单选题(共40道题) 收起 1.（分）--How about taking a break?--______. ?A、Thank you ?B、Good idea ?C、See you ?D、Good-bye 我的答案：B 此题得分：分 2.（分）Seldom ____ any mistakes during my past few years of working here. ?A、would I make ?B、did I make ?C、I did make ?D、shall I make 我的答案：B 此题得分：分 3.（分）Not until all the fish died in the river, _____ how serious the pollution was. ?A、did the villagers realize ?B、the villagers realized ?C、the villagers did realize ?D、didn’t the villagers realize 我的答案：A 此题得分：分 4.（分）--I just got promoted to sales manager. -- __________ ?A、When? ?B、How could you?
?C、Congratulations! ?D、That' s good 我的答案：C 此题得分：分 5.（分）I have been to the doctor’s about my headache. He says there is_____ but I must lie up for a few days. ?A、something serious ?B、anything serious ?C、not serious ?D、nothing serious 我的答案：D 此题得分：分 6.（分）He is ______ of an actor. ?A、anybody ?B、anyone ?C、somebody ?D、something 我的答案：D 此题得分：分 7.（分）I don’t drink ______ water during the day. ?A、a few ?B、much ?C、little ?D、lots of 我的答案：B 此题得分：分 8.（分）_______ have visited the famous scientist. ?A、Both the students