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    He met many problems he was going over his lessons.A. before B. as soon as C. since D. while 【查看更多】

     

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    He met many problems------ he was going over his lessons.

    A. before B. as soon as C. since D. while

     

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    He met many problems            he was going over his lessons.

    A. before

    B. as soon as

    C. since

    D. while

     

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    He met many problems ______ he was going over his lessons.
    [     ]
    A. before
    B. as soon as
    C. since
    D. while

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    He met many problems ________ he was going over his lessons.      
    [     ]
    A. before  
    B. as soon as  
    C. since    
    D. while

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    He met many problems       he was going over his lessons .

    A. before      B. as soon as      C. since     D. while

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