489. ---Shall we go skating or stay at home?

　　　 ----Which ____do yourself?

　　　 A. do you rather　　 B. would you rather　 　

　　　 C. will you rather　 D. should you rather　

487. A computer ______think for itself; it must be told what to do.

　　　 A. can’t　　 B. couldn’t　 C. may not　 D. might not　　　　

[　 ]488 ---Could　 I borrow your dictionary?

　　　 ----Yes, of course you ____.

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

485. I didn’t hear the phone. I ___asleep.

　　　 A. must be　 B. must have been　 C. should be　 D. should have been

[　 ]486 He ______you more help, even though he was very busy.

　　　 A. might have given　 B. might give　

　　　 C. may have given　　　 D. may give　　　　　

484. Where is my pen?　 I ____it.

　　　 A. might lose　　　 B. would have lost　

　　 C. should have lost　　 D. must have lost　

483. You _____return the book now. You can keep it till next week if you like.

　　　 A. can’t　 B. mustn’t　　 C. needn’t　 D. may not　　　　　

482. It’s freezing outside. You ____put on your over-coat.

A.　 had better to　 B. had better　

C. would better　 D. would better to　　　　　　　　

481. The plant is dead. I _____it more water.

　　　 A. will give　 B. would have given　 C. must give　 D. should have given

480. There was plenty of time. She _____.

　　　 A. mustn’t have hurried　 B. couldn’t have hurried　

　　　 C. must not hurry　　　 D. needn’t have hurried

479. I thought you _____like something to read,　 so I have brought you some books.

　　　 A. may B. might　 C. would　 D. must　　　　　　

478.　 Put on more clothes. You ___be feeling cold with only a short on.　　

　　　 A. can　 B. could　 C. would　 D. must