单项选择题

I was ______ the point of telephoning him when his letter arrived.

A．to
B．on
C．at
D．in
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单项选择题
Without computers, we ______ the tremendous medical advancement in the last few decades.
A．would not make
B．will not have made
C．could not make
D．couldn't have made
单项选择题
______ she realized it was too late to go home.
A．No sooner it grew dark than
B．Hardly did it grow dark that
C．Scarcely had it grown dark than
D．It was not until dark that
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