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