单项选择题

It was not until midnight ______ the snowcapped peak.

A．that they sighted
B．that they did not sight
C．did they sight
D．had they sighted
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单项选择题
______ is often the case with a new idea, much preliminary activity and optimistic discussion produced no concrete proposals.
A．That
B．It
C．This
D．As
单项选择题
______ ,he is ready to accept suggestions from different sources.
A．Instead of his contributions
B．For all his notable contributions
C．However his notable contributions
D．His making notable contributions
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