单项选择题

We didn't know his telephone number, otherwise we ______ him.

A．would telephone
B．would have telephoned
C．had telephoned
D．must have telephoned
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单项选择题
Not until many years later ______ known.
A．was the whole truth become
B．did the whole truth become
C．the whole truth became
D．the whole truth had became
单项选择题
This city made ______ progress in such a short time.
A．remarkable
B．gradual
C．sufficient
D．essential
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