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单选题

【C9】______A.have completedB.have been completingC.will have completedD.are completing

A【C9】______

Bhave completed

Chave been completing

Dwill have completed

Eare completing

正确答案:A (备注:此答案有误)

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  • 单选题

    C9______Ahave completedBhave been completingCwill have completedDare completing

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