单项选择题

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

A．would have telephoned
B．must have telephoned
C．would telephone
D．had telephoned
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I often hear her ______.
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C．sing
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Many young people read the English newspaper named the 21st Century ______ improve their English.
A．as to
B．so that
C．in order to
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