问题描述：
There is ____ paper in the corner of his room.
a. a plenty of b. a large number of
c.a pile of d. dozens of
选择C,为何其他的不可以,譬如像B也可以修饰不可数名词
a. a plenty of b. a large number of
c.a pile of d. dozens of
选择C,为何其他的不可以,譬如像B也可以修饰不可数名词
问题解答：
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