28． I’m very grateful for your help and hope that someday I may be able to do something for you ——青夏教育精英家教网—

摘要：28． I’m very grateful for your help and hope that someday I may be able to do something for you ． A． in exchange B． in charge C． in return D． in turn

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I'm very grateful for your help and hope that someday I may be able to do something for you___．

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A. in exchange
B. in turn
C. in vain
D. in particular

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I’m very grateful for your help and hope that someday I may be able to do something for you_____．

A．in exchange B．in charge C．in return D．in turn

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