20. ______ in a friendly way, their quarrel came to an end.

　 A. Being settled　　 　　　　　 B. Settled　　　 　 C. Having settled　　 　 D. Settling

19. The telephone ______ four times in the last hour, and each time it ______ for my roommate.

　 A. has rung; was　 　　　　　　　　　　 B. has been ringing; is　

C. had rung; was　　 　　　　　　　　 D. rang; has been

18. She must be looking forward as much to his return as he himself is to ______ her.

　 A. see　　　　　 　 B. have seen 　　　 C. seeing　　　　　 　　　 D. having seen

17. He often writes to us expressing his hope ______ he’ll come to see us when he returns to China.

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

16. When you play football, what ______ do you play?

　 A. situation　　　 　　 B. place　　　 　　　 C. part　　　　　　 　 D. position

15. ---Why weren’t you at the meeting?

　 ---I ______ for a long-distance call from my father in Australia.

　 A. waited　　　 　　　　 B. was waiting　 　 C. had waited　　　 　　 D. have been waiting