--______ I go home now, sir?www.7caiedu.cn

--No, you ______. You should finish the composition first.www.7caiedu.cn

A. Might; wouldn’t            B. May; had better notwww.7caiedu.cn

C. Must; mustn’t              D. Need; mustn’t

 Bobby ______ me your secret, but he meant no harm.

A. shouldn’t have told                B. should tell       C. mustn’t have told   D. could tell

 I ______ her, but I never could.

A. ought to help     B. must help       C. must have helped  D. ought to have helped

 I promised to get there before 5 o’clock, but now the traffic is still so heavy. They  _____ for me impatiently.

A. may wait          B. must be waiting C. could wait        D. ought to wait

 Look at the ground, it is wet. It  ________ last night.www.7caiedu.cn

A．must have rained B．must rain       C．could have rained     D．may have rained 

 --Who______ it be that is knocking at the door?

--It ______ be Father, but I’m not sure.

A. can; must         B. can; may        C. must; can         D. may; must

 Mr. Smith recommended that she______ a lot of reading in Chinese.

A. do               B. will do           C. does             D. doing

 There was a lot of fun at yesterday’s party. You ____ come, but why didn’t you?

 A. must have       B. should            C. need have        D. ought to have

 —Are you coming to Jeff’s party?

   —I’m not sure. I _________ go to the concert instead.

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

 A scientist is now working on sending visual information to the brain, so that the blind _____ “see”.

A. can be able to            B. is able to

C. could be able to          D. could able to