At the being of the class the noise of desks __could be hear

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At the being of the class the noise of desks __could be heard for over an hour
A.opened and closed B.to be opened and closed C.being opended and closed D.to open and close 答案给的是C,我想知道为什么C对了,A错在哪里

首先,你题目的第3个单词打错了,改为beginning才对.正确的题目是：At the beginning of the class,the noise of the desks being opened and closed could be heard for over an hour.
正确选项是：C.being opened and closed .
这里的desks是宾格,代替了所有格desks'.the desks' being opened and closed 是动名词（的被动语态）的复合结构,做of的宾语,而the noise of the desks' being opened and closed做句子的主语,意思是,“课桌（的抽屉）被打开和关上（产生的）噪音”.
选项 A.opened and closed 错在不能直接用过去分词,而要用动名词的被动语态,也就是说,这里的being是不能少的.

at the beginning of class ,the noise of desks At the begining of class,the noise of desks___ could be hear At the beginning of class,the noise of desks _______ could b [-A72] At the beginning of class ,the noise of desks ______ 英语5道单项选择1.At the bedinning of class,the noise of desks could 英语翻译1.The noise of desks being opend and closed could be hea In the distance ,I could hear the noise of desks ___(open) a at the beginning of class,the noise of desks__could be heard 非谓语动词 At the beginning of the class,the noise of should ( )the teacher in class instead of the noise outside the noise of desk being opened and closed could be heard out 一道英语语法题 What annoys us most is the noise of -----A.the desks