20)Lily isn’t here. She __________ have gone to the school library, or she __________ have gone to the meeting room , or , she __________ have gone home. Who knows?

21)He __________ come today, but I don’t think he will.

22)You __________ come as soon as possible. A terrible thing has happened.

23)If you have been to Beijing , you __________ have been to the Great Wall.

24)I guess your wife __________ be waiting for you at home now .

25)You mustn’t believe the news. It __________ be true.

26)”__________ you tell me where the market is ?” “It’s just beside the cinema. You __________ miss it .”

二、用mustn’t, needn’t 填空

1)Time is flying. We __________ waste our time.

2)You __________ be afraid of the difficulty. We’ll give you a helping hand.

3)”Must I hand in the maths exercises tomorrow?” “No , you __________ . You may hand it in the day after tomorrow.”

4)Tom , you __________ read in the moon light. It’s no good for your eyes.

5)You __________ worry so much. I’m sure he’ll be well soon.

6)You __________ write to me if you don’t have the time .

7)You __________ hurry . I’m sure you won’t be late.

8)You __________ forget to write to me when you arrive there .

9)I told her that she You __________ say these silly things to him .

10)”Must I wait for you ?” “No, you __________.”

11)All cars must be parked there. They __________ be parked here.

12)”May I go now ?” “No, you __________ .You must finish the job before you go .”