单项选择题

We've just installed two air-conditioners in our apartment, ______ should make great differences in our life next summer.

A．which
B．what
C．that
D．they
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单项选择题
______ I sympathize, I can't really do very much to help them out of the difficulties.
A．As long as
B．As
C．While
D．Even
单项选择题
Barry had an advantage over his mother ______ he could speak English.
A．since that
B．in that
C．at that
D．so that
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