We’ve just installed two air-conditioners made in Shanghai in our apartment, ________ should make great differences in our life next summer．
A.which
B.what
C.that
D.they
网友回答
A解析试题分析：本题考查关系代词的用法。详细解答：这是一个非限制性定语从句，此处缺少一个关系代词；由于该非限制性定语从句先行词是air-conditioners，所以关系代词应用which。