问题描述：
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1.We clean our classoom every day.
Our classoom ( ) every day.
A.is cleaned B.are cleaned C.is cleaning D.are cleaning
2.I went to the library and student math.
l went to the library ( ) math.
A.studied B.study C.studying D.to study
1.We clean our classoom every day.
Our classoom ( ) every day.
A.is cleaned B.are cleaned C.is cleaning D.are cleaning
2.I went to the library and student math.
l went to the library ( ) math.
A.studied B.study C.studying D.to study
问题解答：
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