题目内容


---_________ does he take this medicine?
---Twice a day.
A．How longB．How oftenC．How soonD．How much
B

试题分析：四个选项分别表示多长、多久一次、多久和多少钱。根据答语，一天两次。可知选B，他多久吃一次这种药？
点评：英语中由how组合成德疑问词比较多，可以结合how的基本含义怎么，怎样来区分记忆。
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