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computer has been proved to be important aid in classroom teaching．A.The; anB.Th

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computer has been proved to be important aid in classroom teaching．A.The; anB.Th

________ computer has been proved to be ________ important aid in classroom teaching．

A.The; an

B.The; the

C.A; the

D.A; /

试题答案

A

标签：tobeimportantprovedcomputer

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