we should Keep our classroom ---A.cleaned B.clean C.cleaning D.to clean说说原因

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weshouldKeepourclassroom---A.cleanedB.cleanC.cleaningD.toclean说说原因weshouldKeepourclassroom---A.clean

we should Keep our classroom ---A.cleaned B.clean C.cleaning D.to clean说说原因
we should Keep our classroom ---A.cleaned B.clean C.cleaning D.to clean说说原因

we should Keep our classroom ---A.cleaned B.clean C.cleaning D.to clean说说原因
we should Keep our classroom ---A.cleaned B.clean C.cleaning D.to clean
选 B.
keep sth clean 保持.干净, 它是个固定的结构.
keep the classroom clean and tidy
keep your hands dry

B 形容词作状语 A勉强也对

A.cleaned B.clean C.cleaning D.to clean 3.I don