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2道英语题1.There are fifty students in our class,____ are girls.

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2道英语题
1.There are fifty students in our class,____ are girls.
A.twenty of us B.twenty of whom C.twenty of them
(答案是B,为什么不是C?)
2.有一句话:Our neighbor's house is of the same size as ours(为什么加of)
1.此句是非限制性定语从句,需要用引导词,of又是介词,当然用whom
2.be of 的用法
具有...性质,内容
eg:the picture is of many differences from the other one.
意思还有'有‘的意思