第一部分 TEXT

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. 我的牙科医生刚刚给我拔掉了一颗牙, 叫我休息一会儿. 我想说点什么, 但我嘴里塞满了药棉. 他知道我收集火柴盒, 于是问我收藏的米柴盒是否在增加. 接着他又问我的兄弟近来如何, 问我是否喜欢伦敦的新工作. 作为对这些问题的回答, 我不是点头, 就是发出奇怪的声音. 与此同时, 我的舌头正在忙着寻找刚拔掉的那颗牙的伤口. 我突然非常着急起来, 但却什么也说不出来. 当那位牙医最后将药棉从我嘴中取出时, 我总算有可能告诉他, 他拔错了牙..

第二部分 LANGUAGE POINTS

1、I tried to say something, but my mouth was full of cotton wool.
try to do sth.:试图做某事（但不一定能做成）
cotton wool：不可数名词

2、He knew I collected match boxes and asked me whether my collection was growing.
collection：收集品的总和，常用单数
grow：增加

3、He then asked me how my brother was and whether I liked my new job in London.
注意2个宾语从句的词序（陈述句词序）

4、In answer to these questions I either nodded or made strange noises.
In answer to these questions：作为对这些问题的回答
in return for 作为对...的报答
either...or:或者...或者...

5、Meanwhile, my tongue was busy searching out the hole where the tooth had been.
meanwhile=at the same time=in the mean time;用法和 however 一样,不能连接两个句子,但是意思上有承接概念
where the tooth had been:定语从句修饰hole
the tooth:the tooth that had been pulled out
be busy doing sth.:忙着做...
search out:找出/找到

6、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.
removed the cotton wool from my mouth=took the cotton wool out of my mouth.
was able to:表示在某种特殊情形下能....，此处不能用could代替

第三部分 KEY STRUCTURES AND USAGE

topic sentence(以往课文中的段落中心句)
=>Dentists always ask questions when it is impossible for you to answer.
=>People are not so honest as they once were.
=>Jasper White is one of those rare people who believes in ancient myths.
=>Aeroplanes are slowly driving me mad.
=>If you park your car in the wrong place, a traffic policeman will soon find it.

动词make和do的用法
=>He has made progress.
=>You never do a job properly.
=>Why can't you make up your mind?
=>I have to go out now. I must do some shopping.
=>Do me a favour, will you?
=>Don't make such a noise.
=>You have just made a mistake
=>He always does his best.

新概念英语第二册-Lesson 48 视频英语课文讲解: http://www.insuns.com/english/2006/1204/13061.html