12. The difficulty we now meet with is _______ we can persuade him to tell the truth.

A. whether 　　　　 B. that　　　　　　　　　 C. what　　　　　　　　 D. how　

11. The boy was criticized for forgetting ________ his textbooks to school.

A. bringing　　　　　 B. to bring　　　　　　 C. having brought　　　　　　　　　　 D. to have brought　　　

10. I saw some trees _______ the leaves were black with disease.

A. where　　　　　　　　　　 B. of which　　　　　　　　　 C. in which　　　　　　　　　 D. whose　　　　　　

9. That will be the second cigarette he ________ today.

A. smoked　　　　　　 B. has smoked　　　　　　　　　 C. had smoked　　　　　　　　　 D. would smoke　

8. Charles Battage is considered ________ the first computer.

A. to have invented　　　　　　 B. inventing　　　　　 C. to invent　　　　　 D. having invented　　　

7. Mary: Mike, I'm very sorry I've lost the magazine I borrowed from you.

Mike: __________.

Mary: I guess I'd better not. I don’t want to let it happen again.

A. That's all right, Mary, I don't want it

B. Don't worry, I can get a cheaper one

C. It's no good crying over split milk, so forget it

D. It doesn't matter. Would you like to take the new one?　　　　　　　　

6. He listened attentively to me ______ while______ at me.

A. spoke, stared　 B. speaking, staring　　　　　 C. spoke, staring　 D. speaking, stared　　

5. Bad habits, ______ formed, are difficult to get rid of.

A. and　　　　　　　　　 B. once　　　　　　　　 C. or　　　　　　　　　　 D. but　　

4. There are No 2 trolley-bus and No 24 motor-bus; ________will take you there.

A. both　　　　　　　　 B. either　　　　　　　　　　　 C. all　　　　　　　　　　 D. any　　

3. Mary: Why didn't you phone me from the station when you arrived?

Jack: I'm sorry. I didn't have any small change. __________.

A. You must be joking　　　　　　　　　　　 B. I'm always myself

C. That's why　　　　　　　　　　　　　　　　　 D. I missed the train