A candidate for the post ______ at the moment.
A. is interviewing
B. being interviewing
C. interviewing
D. is being interviewed
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By the end of last year the railway ______.
A. was being completed
B. would be completed
C. had been completed
D. had completed
I ______ to visit their country before long.
A. have been invited
B. am being invited
C. had been invited
D. shall be invited
Theory ______ with practice.
A. must be combining
B. must combine
C. must have been combined
D. must be combined
He said such a thing ______ to happen.
A. ought to be not allowed
B. ought not to be allowing
C. ought not to have allowed
D. ought not to be allowed
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