【題目】__________ work has been done to improve people's living standard.

A. Many

B. A great many

C. A great deal of

D. A large number of

【答案】C

【解析】句意:為提高人們的生活標準，已經(jīng)做了大量的工作。work為不可數(shù)名詞，用a great deal of修飾。

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