—_____ do you water the flowers? —Twice a day.
A．How manyB．How many timesC．How oftenD．How soon
C

試題分析：How many多少個；How many times多少次；How often 多久一次；How soon多久。根據(jù)下文，一天兩次�？芍衔膯柕氖�，你多久澆一次花？故選C。
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