At the time of the earthquake Jeff was still in his office. He to finish a project before he left for the day.

A. has tried B. had tried

C. has been trying D. had been trying

The student didn’t pay any attention to the lecture; he of something else.

A. thought B. had thought

C. would think D. was thinking

—Such a mistake could have been avoided.

—Unfortunately, he the mistake again and again.

A. repeated B. would repeat

C. had repeated D. would have repeated

—Did you find the missing couple in the mountain yesterday?

—No, but we to get in touch with them ever since.

A. have tried B. have been trying

C. had tried D. had been trying

I would have come sooner but I that they were waiting.

A. haven’t known B. hadn’t known

C. don’t know D. didn’t know

－Oh, it’s you, Steve! I you.

－No surprising. I’ve just had my hair cut.

A. don’t recognize B. haven’t recognized

C. didn’t recognize D. hadn’t recognized

I’m glad to see that you a lot of progress since I you last.

A. will make; have met B. have been making; met

C. had made; met D. have made; meeting

－Have you finished your composition already?

－Yes. I it in twenty minutes.

A. have finished B. finished

C. will finish D. had finished

Once a programme put into a computer, it accordingly.

A. is; acts B. is being; is acting

C. has been; will act D. will be; acts

—What place is it?

—Haven’t you seen that we back where we ?

A. were；had been B. are；were

C. were；have been D. are；had been