2. 外语
  3. ______otherwise directed by a doctor, this medicine should be taken three times a day.

______otherwise directed by a doctor, this medicine should be taken three times a day.

admin2016-03-04  73
问题 ______otherwise directed by a doctor, this medicine should be taken three times a day.
选项 A、Even if
B、Unless
C、Except that
D、As
答案B
解析 otherwise，副词，意为：“另外，别的样的”，按照句意，应选unless“除非”。句意为：除非医生有别的指示，否则这药应一天吃三次。
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