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
Could you tell me ______
A．who is that girl
B．that girl is who
C．who that girl is
D．whom is that girl
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