Our classroom is tidy because it ____ every day.
A．cleansB．cleaned
C．is cleanedD．was cleaned
C

試題分析：句意：因為教室每天都被打掃，所以我們的教室是清潔的。分析：考查被動語態(tài)的用法，被動語態(tài)的構成：be done（動詞的過去分詞），通過every day（每天）體現(xiàn)為一般現(xiàn)在時的被動語態(tài)。故選 C
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