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        1. —Sam, let’s go and play basketball.

          —Not now. I ______ Dick with his English.

          A. help                  B. helped               C. am helping         D. have helped


          【答案】C

          【解析】考查動詞現(xiàn)在進行時態(tài)的用法。因為答句的句首含有now,因此該句要使用現(xiàn)在進行時態(tài)的用法,即:be+動詞的現(xiàn)在分詞形式。所以選擇C答案。


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