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The teaching desk remains with dust, which seems not to have cleaned for a long

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The teaching desk remains with dust, which seems not to have cleaned for a long

Theteaching desk remains________________with dust, which seems not to have cleanedfor a long time.

A.covered    B.be covered    C.covering   D.be covering

 

试题答案

答案:A

提示:
注意remain也是系动词可以直接加过去分词表示被动。