Could/Can they be chatting in his office? 他们可能在他办公室里聊天吗？

No, they can't/couldn't be doing that now.不，现在他们不可能在做那事。

【典型例题】

例：单项选择.

（ ）1. She likes ____ to the movies with her friends.

A. a little B. little C. a few D. few

（ ）2. Where ________ your pen pal ______ from?

A. does, come B. going, with C. goes, with D. going, and

（ ）3. Please write ______ me and tell me _________ yourself.

A. to, to B. to, about C. about, to D. about, about

（ ）4. Where ________ you come from? I ________ from China.

A. are, am B. be, are C. keep, am D. do, come

（ ）5. Can you speak English? Yes, but only __________.

A. a little B. little C. a few D. many

Keys：1. A 2. A 3. B 4. D 5. A

（ ）6. We _______ homework at school.

A. don't B. not do C. don't do D. aren't do

（ ）7. ______ he have _____ brothers and sisters?

A. Is, any B. Do, some C. Does, some D. Does, any

（ ）8. We go to school five days _____ week.

A. a B. an C. the D. all

（ ）9. Do you enjoy ________ books on computers?

A. to read B. read C. reading D. reads

（ ）10. _____ do you like about China? The people and the food.

A. What B. Where C. How D. Why

Keys：6. C 7. D 8. A 9. C 10. A

（ ）11. Bridge Street is a good _____ to have fun. It's a busy street.

A. house B. garden C. bank D. place

（ ）12. You can buy some food in the market if you_________.

A. old B. are old C. hungry D. are hungry

（ ）13. I think you will have to ______ the bank.

A. across B. through C. pass D. go

（ ）14. The bank is ________ 208 Chang'an Street.

A. on B. at C. in D. from

（ ）15. There is a big desk between ______ and _________.

A. he, I B. he, me C. him, I D. him, me

Keys：11. D 12. D 13. C 14. C 15. D

（ ）16. Let me _____ you how _____ to Heping Hotel.

A. to tell, to get B. tell, get

C. to tell, get D. tell, to get

（ ）17. The pay phone is 100 metres ________ ________ the left.

A. away, on B. along, on

C. far, in D. away, in