14. -What were you doing when she dropped in?

　　 -I for a while and_________ some reading.

A. was playing; was going to do　 B. played; did

C. had played; was going to do　　 D. had played; did

13. It was not a good idea to go skating. You __________your leg.

A. can break　　　　　　　　　　 B. could break

C. could have broken　　　　　　 D. could have been broken

12. Although motor car has been with us for almost a century, I have never been able to drive __________American one.

A. the ; an　 B. was remained　　 C. a; the　　 D. the ; the

11. Nothing__________ after the terrible fire which had been caused by someone smoking in bed.

A. left　　 B. was remained　　 C. remained　　 D. continued

10. If you want to see a doctor, fix the date with him ahead of time. This is a common ___________ in the USA.

A. habit　　 B. law　　 C. rule　　 D. custom

9. with the size of the whole earth, the highest mountain doesn't seem high at all.

A. When compared　　　　　　　　　 B. To compare

C. While comparing　　　　　　　　 D. It compared

8. He___________ when the bus came to a sudden stop.

A. was almost hurt　　　　　　　　 B. was to hurt himself

C. was hurt himself　　　　　　　　 D. was hurting himself

7. -What would you wish to do if you were a college student again?

　 -That's very hard to say, but I wish I when I was a college student.

A. has not studied biology　　　　　 B. did study biology

C. had studied biology　　　　　　　 D. studied biology

6. His parents meant him_____________ scientific research, but he showed no interest and turned poet.

A. going in for　　　　　　　　　　 B. to have gone in for　　

C. to go in for　　 　　　　　　　　D. having gone in for

5. -Why didn't you answer my phone when I phoned you at about 11 p. m. yesterday?

　 -I ___________and failed to hear the phone.

A. might have slept　　　　　　　 B. must be sleeping

C. might be sleeping　　　　　　　 D. must have been sleeping