TextDentists always ask questions when it is impossible for you to answer.It is impossible(for sb)to do sth 对某人来讲做…是不可能的（不定式做真正的主语）it is impossible + that 从句 （that 从句做真真正的主语）eg It is impossible to get a taxi on such a raining day. 在这样的雨天打到出租车是不可能的。
eg It is impossible that one and one makes three. 一加一等于三是不可能的。
eg It is impossible for one and one to make three. 一加一等于三是不可能的。
以人或事为主语时，impossible 不能做表语与不定定式连用，必须it 做主语。
eg It is impossible for him to do it. (T) 对他来讲，做这件事式不可能的。
He is impossible to do it. (F)此外，It 也可不做主语，而做宾语eg Illness made it impossible for him to go. (T)生病使得他不可能走：Illness made him impossible to go. (F)impossible adj 令人无法忍受的，eg He is impossible.他是令人讨厌的。
My dentist had just pulled out one of my teeth and had told me to rest for a while.tooth n 牙齿teeth(pl.)I tried to say something, but my mouth was full of cotton wool.be full of 塞满，充满还原后: He then asked, " how is your brother? Do you like your new job?"then 1那时，当时eg I lived in the country then. 那时我住在乡下。
Lesson 48 Did you want to tell me something?你想对我说什么吗？Why did the writer become very worried?Dentists always ask questions when it is impossible for you to answer . My dentist had just pulled out one of my teeth and had told me to rest for a while. I tried to say something, but my mouth was full of cotton wool. He knew I collected match boxes and asked me whether my collection was growing. He then asked me how my brother was and whether I liked my new job in London. In answer to these questions I either nodded or made strange noises. Meanwhile, my tongue was busy searching out the hole where the tooth had been. I suddenly felt very worried, but could not say anything. When the dentist at last removed the cotton wool from my mouth, I was able to tell him that he had pulled out the wrong tooth.参考译文牙科医生们总是在你无法作出回答的时候向你提出问题。
【导语】新概念英语作为家喻户晓的经典之作，它有着全新的教学理念，有趣的课⽂内容及其全⾯的技能训练，为⼴⼤的英语学习者提供帮助！如果你也想学好英语，⼜怎能错过新概念英语？下⾯为您提供了相关内容，希望对您有所帮助！ 词汇学习 Word study pull vt.,vi. (1)拉，拖，牵，扯： I felt someone pulling my arm. 我觉得有⼈在拉我的胳膊。
They pulled the heavy bag into a room. 他们把那个重袋⼦拖到⼀个房间⾥。
You have to pull hard. 你得⽤⼒拉。
(2)拔，抽： You've pulled out the wrong teeth! 你拔错了⽛! He pulled an address book from his pocket. 他从⼝袋⾥抽出⼀本通讯录。
nod (1)vt.,vi. 点头，点头⽰意/招呼： I asked him if he wanted to come and he nodded his head. 我问他是否想来，他点了点头。
When we meet each other in the office, he always nods at me. 我们在办公室见⾯时，他总是向我点头打招呼。
(2)vi. 打盹，打瞌睡(常与off连⽤)： He used to nod off during the French class. 他过去常在上法语课时打瞌睡。
As he was very tired, he nodded over his reading.因为他很累，所以他⼀边看书⼀边打盹。
练习答案 Key to written exercises 1.难点练习答案 A 1 which 2 denied 3 fetched4 too5 jobs6 One…a…who 7 past 8 next 9 watching 10 continually 11 remarked 12 robbed B (sample sentences) I'm sorry to cause you such trouble. Have you ever seen such beautiful pictures before? It's such a nice day that we can't stay indoors! I'm feeling so tired that I shall have to stop work. C 1 He had no sooner come home than they rang him up from the office. 2 The plane had no sooner taken off than it returned to the airport. D 1 made 2 do 3 make 4 do 5 Do 6 make 7 made8 does E 1 out 2 up 3 up 4 up…away 5 up 6 out 7 back 8 up with 9 up with F (sample sentences) If you don't stop that noise at once, you'll have to go to bed. I'm at a loss to know what to do. It's stopped raining at last! He's very busy and can't accept any more work at present. I'll be at home tonight. 2.多项选择题答案 1c 2b 3c 4b 5a 6c 7b 8 b 9 d 10 a 11b 12 c。
