单项选择题

______ England improve their game, they're going to lose the match.

A．Unless
B．If
C．As
D．As long as
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单项选择题
The room ______ windows are painted blue is our classroom.
A．which
B．that
C．in which
D．whose
单项选择题
Not until I graduated from the college ______ how much time I had wasted.
A．have I realized
B．I have realized
C．did I realize
D．that I realized,
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