1 . One__________ as hard as one can at a young age before it becomes too late.

A．might have worked	B．ought to work
C．would work	D．must have worked

2 . 我的姐姐回家时满脸笑容。她一定通过驾照考试了。(情态动词 + have done)
My sister came home with a broad smile on her face. She ____________________________.

3 . 你很熟悉这个城市，你一定在这里待了很长时间。(must)
You are very familiar with the city; you ________ here for a long time.

4 . You_______________(一定有过一些时刻) when you were disappointed. （“must have done sth ”意为“一定做过某事”）

5 . 选词填空
1. He ____________(must/might) get here in time,   but I can’t be sure.
2. —How long ____________(may/must) I keep this book?
—You may keep it for two weeks.
3. He ____________ (can’t/mustn’t) have missed the train;   he arrived at the train station two hours early.
4. John, look at the time. ____________ (Must/Can) you play the piano at such a late hour?
5. She ____________(might/must) have achieved greater progress,   if you had given her more chances.
6. —That must be a mistake.
—No, it ____________ (can’t/mustn’t) be a mistake.
7. Paul did a great job in the speech contest. He ____________(must/can)have practised many times last week.
8. It is usually warm in my hometown in March, but it ____________(may/can)be rather cold sometimes.
9. I can make a lantern now,   but I ____________(can’t/couldn’t)when I was young.
10. —Can we go out and play football now?   
—No,   you ____________(can’t/mightn’t).

6 . Tom didn’t respond to any of my calls. Something ____________________________ to him.  
汤姆没接我的电话。他一定是出什么事了。

7 . 他一定完成了他的工作；否则，他就不会在海边玩了。 (otherwise) (汉译英)

8 . 他如此见多识广,一定去过很多地方且读过很多书。(well-informed;情态动词 + have done) (汉译英)

9 . —You talk so much about London.You ________have been there.
—Yeah,I went sightseeing on a tour last summer. (用适当的词填空)

10 . 他肯定是受到了惩罚，因为他今天不高兴。
He __________________for he is upset today .