19．-Do you know when the Chinese custom ________ from？

-It's hard to say. But its characteristics ____________the Tang Period.

A. began; prove　　　 B. started; show　　　 C. is; appear　　　 D. dates; suggest

18．--Oh, mustn't you? Stay a bit longer. It's been such　　　　 fun having you.

　　 --Thanks anyway. I've got　　　 early start tomorrow morning.

　　 A. 不填; the　　 B. a; an　　 A.不填;an 　　D. the; an

17．-Thank you so much for helping me with my English .　　 - 　　　　.

　　　 A.With pleasure 　　　 B.A pleasure 　　 C.I’m glad to hear that 　D.No thanks

16．It is your own fault　　 you are so tired . You oughtn’t to have stayed up so late .

　　　 A．when 　　　　　　　　 B．how 　　　　　　　　　 C．where 　　　　　　　　 D．why

15. The teacher came to the classroom and demanded ________ what had happened.

　 A. his students to tell him　 B. being told　 　C. telling him　 D. to be told

14. A love marriage, however, does not necessarily_______ much sharing of interests and responsibilities.

　 A. take over　　　 B. result in　　　 C. hold on　　 D. keep to

13. Doing your homework is a sure way to improve your test scores, and this is especially true ______ it comes to classroom tests.

　 A. before　　　 B. since　　　　 C. when　　　 D. after

12. We are all for your proposal that the discussion ________.

　 A. be put off　　 B. was put off　　　 C. should put off　　 D. is to put off

11. I haven' t seen Mary these past few days. I' m afraid she ________ herself for some time.

　 A. isn't feeling　 B. hasn't been feeling　 C. hadn't been feeling　 　D. wasn't feeling

10. -- Leaving for Shanghai?　　 　-- ________.

　 A. Soon　　　　 B. Lately　　　　 C. The other day　　 D. Sooner