【题目】Some countries have banned smoking in public places ______ public health．
A． improve B． to improve
C． improving D． improved
在线课程【答案】B
【解析】考查不定式，to do sth用来表示目的。
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Some countries have banned smoking in public places public health．A． improve B． to improveC． improvi
编辑：chaxungu时间：2026-04-27 02:56:13分类：高中英语题库
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