问题描述：
这是一道选择题：
___ work has been done to improve the people's living standard.
A.Many B.A great many C.A large number of D.A great deal of
我选择的是C,可正确答案是D.
___ work has been done to improve the people's living standard.
A.Many B.A great many C.A large number of D.A great deal of
我选择的是C,可正确答案是D.
问题解答：
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