题目内容

Is this the first or the second time that you ____ the safari park?

A. had visited
B. have visited
C. visited
D. visiting

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By the end of July, I ____ in the lab for seven months.

A. would have been working
B. have worked
C. will have worked
D. will have been working

The manager was said to have arrived back from Paris where he ____ some European business partners.

A. would meet
B. is meeting
C. had met
D. meets

It is the most instructive lecture that I ____ since I came to this school.

A. attended
B. had attended
C. am attending
D. have attended

The old palace caught fire last month, and little of the original building ____ now.

A. remains
B. is remained
C. is remaining
D. has been remained