单项选择题

If it ______ for the snow, we ______ the mountain the day before yesterday.

A．were not; could have climbed
B．were not; could climb
C．had not been; could have climbed
D．had not been; could climb
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单项选择题
Helen was attracted by a pair of shoes ______ in the shop window.
A．demonstrated
B．displayed
C．revealed
D．exposed
单项选择题
His latest works have really ______ his reputation as a writer.
A．expressed
B．established
C．estimated
D．ensured
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