The experiment requires more money than ______.[2002]A、have been put inB、being

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问题 The experiment requires more money than ______.[2002]

选项 A、have been put in
B、being put in
C、has been put in
D、to be put in

答案 C

解析 句中than引导比较状语从句,从句中的主语被省略,另外money为不可数名词,故用has been put in,选项C正确。
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