28．At the beginning of class.the noise of desks could be heard outside the classroom． A．op——青夏教育精英家教网—

摘要：28．At the beginning of class.the noise of desks could be heard outside the classroom． A．opened and closed B．to be opened and closed C．being opened and closed D．to open and close

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At the beginning of class，the noise of desks ________ could be heard outside the classroom．

A．opened and closed B．to be opened and closed

C．being opened and closed D．to open and close

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At the beginning of class，the noise of desks　　　　 could be heard outside the classroom.?

A.opened and closed　　　　　　　　　　　　　 B.to be opened and closed?

C.being opened and closed　　　　　　　　　　　 D.to open and close

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