15. __________ the news, tears of joy came into her eyes.

　A. When she heard 　　B. Having heard　　 C. While hearing　　 D. Hearing

SB 2B Units 23

单项选择:

14. Time _______, I will do it much better.

　 A. permits　　 B. permitted　　 　C. permitting　　 D. permit

13. The classroom is empty. The students _________ to the playground.

　 A. must go　　 B. must have gone　 　　C. can go　　 D. may go

12. There was plenty of time, so you _________ have hurried.

　 A. shouldn’t　　 B. wouldn’t　　　 C. mustn’t　　　 　D. needn’t

11. The plane _________ at eight, but it arrived two hours later because of the weather.

　 A. should have arrived 　　B. should arrive　　 C. ought not to arrive　 D. must have arrived

10. __________ the last bus, he went home by taxi.

　 A. Having not caught　　 B. Not having caught　　 C. Not catching 　D. Having caught

9. Her mother was __________ carefully in hospital.

　 A. looked　　 B. cared　　　 C. attended 　　D. helped

8. They ________ the old house, and it was burnt down ___________.

　A. set fire to, to　 　　　B. light a fir to, on

　 C. set a fire to, on　　　 D. make a fir on, to

7. There is _______ he will win the prize.

　 A. reason, if　　　 B. doubt, whether　　　 C. reason, that　　 D. doubt, that

6. He is suffering _________ a terrible cold.

　 A. from 　　　B. with　　 C. at　 D. out of