单项选择题

The two students talked as if they ______ friends for years.

A．should be
B．would be
C．have been
D．had been
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单项选择题
He was ______ today, but was asked to stay for ______ week.
A．to have returned; another
B．returning; one more
C．returned; another
D．to return; other
单项选择题
—Where do you think ______ he ______ the computer — Sorry, I have no ide
A． has; boughtB. / ; boughtC. did; buyD. had; bought
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