题目内容

I____ aletteronceaweektomyfamilywhenIwasinmyfirstcollegeyear.

A. write
B. waswriting
C. havewritten
D. wrote

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More than a dozen students in that school ____ abroad to study medicine last year.

A. sent
B. were sent
C. had sent
D. had been sent

-Mary will not attend the party tonight.-But she ____she would.

A. has promised
B. promised
C. will promise
D. promises

-That must habe been a hard project?-yeah, it ____us a whole year to finish the work.

A. took
B. has taken
C. takes
D. was taking

Scientists have many theories about how the universe ____ into being.

A. came
B. was coming
C. had come
D. would come