练习答案 Key to written exercises
Lesson 64
A
1 Jimmy is better now but he mustn't get up yet.
2 Jimmy has a cold and he must stay in bed.
3 Jimmy can get up for two hours each day.
4 Jimmy often reads in bed.
5 Jimmy listens to the stereo, too.
6 Jimmy doesn't feel ill now.
B
1 Don't take any aspirins!
You mustn't take any aspirins!
2 Don't take this medicine!
You mustn't take this medicine!
3 Don't call the doctor!
You mustn't call the doctor!
4 Don't play with matches!
You mustn't play with matches!
5 Don't talk in the library!
You mustn't talk in the library!
6 Don't make a noise!
You mustn't make a noise!
7 Don't drive so quickly!
You mustn't drive so quickly!
8 Don't lean out of the window!
You mustn't lean out of the window!
9 Don't break that vase!
You mustn't break that vase!
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课文详注 Further notes on the text
1．play with, 玩……（东西）。
2．make a noise, 搞出声响。
noise是抽象名词。抽象名词是不可数的，前面加不定冠词a并不意味1、2、3、4等数目，只是赋予那个名词具体的含义，如一次、一种、一例、一番等。又如：
have a rest 休息一下
take a look at… 看一眼……
3．lean out of the window, 把身子探出窗外。
out of是介词短语，与 in或 into相对，表示“离开”、“脱离”。
语法 Grammar in use
禁令：don't与mustn't都可用来表示禁令。用mustn't表示“禁止”或“不许可”，语气比较强烈。
词汇学习 Word study
1．keep v.
（1）使保持某状态；保持：
（2）保存；保留：
（3）保守；储藏：
2．remain v.
（1）留下；停留：
（2）保持不变：
