题目内容
---Please tell me ______ it will be taken, doctor.
---Once every four hours, please.
- A.when
- B.how often
- C.how soon
- D.how long
B
就频度提问用how often。
就频度提问用how often。
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题目内容
---Please tell me ______ it will be taken, doctor.
---Once every four hours, please.