题目内容
There are 30 classrooms ____________ our school. Mine is _____________ the second floor.
A. on; in B. in; in
C. in; on D. on; on
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题目内容
There are 30 classrooms ____________ our school. Mine is _____________ the second floor.
A. on; in B. in; in
C. in; on D. on; on