—It looks ________ the merchant ________ rid of his fever.

—In actual fact, he is still very weak.

A. as if; gets　　　　  B. that; has got　　   C. as if, got　　　　   D. as if; had got

—My goodness! We have missed the flight.

—We ________ it, but we were caught in the traffic jam.

A. could have caught　　　　　　　　　　　　  B. ought to catch

C. might catch　　　　　　　　　　　　　　　　　　　　  D. must have caught

The pilot kept calm in the terrible storm, otherwise the accident ________.

A. couldn’t be prevented　　　　　　　　　　　　    B. mustn’t have prevented

C. wouldn’t have been prevented　　　　 D. shouldn’t prevent

It’s ten years since the scientist ________ on his life’s work of discovering the valuable chemical.

A. made for   B. set out 　　  C. took off     D. turned up

That young man has made so much noise that he ________ not have been allowed to attend the concert.

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

—Don’t forget to take the message to my teacher.

—______________.

A. Yes, I will　　　　  B. No, I won’t　　　　　　  C. I don’t’ think so D. Sorry, I don’t

I lived with my sister this summer and didn’t have to pay rent. So I ________ save most of my salary.

A. could　　　　　　    B. would　　　　　　   C. was able to　　    D. should

He ________ without saying good-bye to them, for he always has good manners.

A. mustn’t have left　　　　　　　　　　　　　　　　   B. may not leave

C. shouldn’t have left　　　　　　　　　　　　  D. can’t have left

I saw him leave the office an hour ago. He ________ at this time.

A. mustn’t be working　　　　　　　　　　    B. can’t be working

C. can’t work　　　　　　　　　　　　　　　　    D. may not working

—I was so sure that our experiment was going to succeed, but something went wrong at the last moment.

— ________, but don’t give up.

A. You don’t mean that　　　　　　　　　　   B. Find out the reason

C. Never mind　　　　　　　　　　　　　　　　　　　　  D. I’m sorry to hear that