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    - did you spend working out the problem? -About two hours. A.How much B.How many C.How soon D.How long 答案:D 【查看更多】

     

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    —______did you spend working out the problem?

    —About two hours.

    A. How much　　 　　  B. How many　　 　　   C. How soon　　 　　    D. How long

     

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