Is necessary to take off our shoes when we enter the lab? A. everyone B.this C.her D.it——青夏教育精英家教网—

摘要： Is necessary to take off our shoes when we enter the lab? A. everyone B.this C.her D.it

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Is ________ necessary to take off our shoes when we enter the lab?

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Is ________ necessary to take off our shoes when we enter the lab?

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Is _____ necessary to take off our shoes when we enter the computer lab?

A. this B. it C. everyone D. he

Is _____ necessary to take off our shoes when we enter the computer lab?

A. this B. it C. everyone D. he

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