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单选题
77.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
答案解析
正确答案：A
解析：
解析:语法结构。which引导一个非限制性定语从句。that和what都不引导非限制性定语从句。如果句子中间的逗号改成分号,就应用they,否则用they就会使得整句犯句子堆砌(run-on sentences)的毛病。 我们刚在套房里装了两台空调,这样会使明年夏天的生活大不一样。
相关知识点：
which引导非限定性从句
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