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    --- Has Sam finished this homework today? --- Yes. He it this morning. A. did B. has done C. was doing D. had done 【查看更多】

     

    题目列表(包括答案和解析)

    --- Has Sam finished this homework today?

    --- Yes. He         it this morning.

    A. did      B. has done     C. was doing  D. had done

    查看答案和解析>>

    --- Has Sam finished this homework today?

    --- Yes. He         it this morning.

    A．did                             B．has done              C．was doing           D．had done

    查看答案和解析>>


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