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    ---Do you know when Mr. Green will come? ---Sorry, I have no idea. But if he , I will call you. A. comes B. is coming C. will come D. come 【查看更多】

     

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    —Do you know when Mr. Green will come?    
    —Sorry, I have no idea. But if he _____, I will call you.
    [     ]
    A. comes      
    B. is coming    
    C. will come    
    D. come

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