从句请帮忙分析分析谢谢
问题描述：
从句请帮忙分析分析谢谢
____has been mentioned before ,nearly all materials expand with the increase of temperature
A.That B As C Because D It
They usually offer the available seats to ____comes first
A,whomever B whom C who D whoever
还请详细分析.谢啦.现在还没积分 以后有的话就献上
答
D
这句是 主语从句.IT指代的是后面的这句话,即金属受热会膨胀.
A
whomever也就是 anyone who comes first
因为anyone是做to的宾语,因此用whom而不用who