Mary can’t help ________ the room because she’s busy with her homework．

[　　]

A．to clean

B．cleaning

C．cleaned

D．being cleaned

答案：A
解析：

to clean不定式結(jié)構(gòu)做目的狀語(yǔ)，表示無(wú)法幫忙去打掃房間。


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