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问题: 一题百思不得其解的英语选择题

( )in the group were Chinese.Some of them were English.

A.Not all the visitors
B.Not all of visitors.

答案是A,但为什么不是B呢?

Not all of和Not all the有什么区别啊?

解答:

all用于修饰名词时,通常可直接放在名词前。
但当名词前有定冠词the,或有物主代词(如his,my等)时,则要添上of来修饰,也就是all of来修饰这一名词短语。
所以本题答案应为A。