18. ____Must I finish this novel this morning ?

____No, you_____.

A. mustn't 　　　　　　 B. might not 　　　　 C. don't have to 　　 D. can't

17. A lion _______ only attack a human being when it is hungry.

A. should 　　　　　　 B. can 　　　　　　　　 C. will 　　　　　 D. shall

16. Would you open the window please?

Yes, I______.

A. will 　　　　　　　　 B. would 　　　　　　 C. do 　　　　　　 D. can

15. The teacher do all the exercises, but a pupil_______.

A. needn't....must B. may not...must　 C. needn't....needn't 　　　 D. can't....must

14. ______I go back before lunch?

No, I don't think you________.

A. Need...must 　　o 　　 C. Must...have to 　 D. May .... ought to

13. Tom was a diligent boy. He _______ go to school though it was raining hard.

A. was able to 　　　 B. could 　　　　　　　 C. couldn't 　　　　　 D. wasn't able to

12. There was plenty of time. You _____.

A. mustn't hurry 　 B. mustn't have hurried　 C. needn't hurry 　　 D. needn't have hurried

11. The professor gave orders that the experiment _______ before 5:30 p.m.

A. be finished 　　　 B. will finish　　　　 C. must be finished 　　　 D. would be finished

10. I mailed the letter two weeks ago. She _____ it.

A. must receive 　　 B. can't receive 　　 C. might receive 　 D. must have received

9. If he started at 9 0'clock, he _______ be there by now.

A. need 　　　　 B. shall 　　　　　　　　 C. ought to 　　　　　 D. must