题目内容

It _____ for a week and the streets were flooded.

A. has rained
B. was raining
C. had been raining
D. has been raining

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He said that he _______ since two o’clockthatmorning.

A. waswriting
B. wrote
C. has been writing
D. had been writing

It ____ that every student will pass the examination.

A. hoped
B. is hoped
C. hopes
D. is hoping

By the end of thiscentury, scientists ______ a cure for the common cold.

A. must discover
B. must have discovered
C. will have discovered
D. would discover

Mr. Smith _______with the government for 40 years by the time he retired.

A. would have worked
B. has worked
C. could have worked
D. had worked

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