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        1. --- Doctor, ________ should I take this medicine?    --- Twice a day.
          A.how oftenB.how muchC.how soonD.what time
          A

          試題分析:句意:——醫(yī)生,我應該多久吃一次藥?—— 一天兩次。A. how often 多久一次(就頻率來提問);B. how much 多少(就價錢來提問或者修飾不可數(shù)名詞);C. how soon 還要多久(常用在一般將來時態(tài)的句子中,其答語通常是“in + 一段時間”);D. what time幾點,根據(jù)一天兩次,可知就頻率來提問,故選擇A。
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