单项选择题

I ______ him the Christmas gift by mail because he came home during the Christmas holidays.

A. ought to have sent
B. couldn't have sent
C. must have sent
D. needn't have sent
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单项选择题
A woman has to be ______ a man to go half as far.
A. twice as good as
B. as twice good as
C. twice good as
D. twice so good as
单项选择题
Mary is 18 years old this year; she ______ 19 next year.
A. will be
B. is to be
C. is going to be
D. should be
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