The room ___________. It’s a real mess.
A. must be cleaned up
B. must cleaned up
C. must clean up
A

試題分析：句意：這個房間必須打掃了。它真的很亂。結合語境可知句子主語是動作對象，故用被動語態(tài)。選A。
點評：此類題型主要是確定句子主語與謂語動詞的關系。如果是主動關系則用主動語態(tài)，反之如果是動賓關系，則用被動語態(tài)。
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