How often has the affects of smoking and second-hand smoke been reported in the newspaper? The main idea of this passage is ___

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问题 How often has the affects of smoking and second-hand smoke been reported in the newspaper?
The main idea of this passage is ______.

选项 A、parents shouldn’t smoke
B、children should avoid smoking
C、the affects of smoking and second-hand smoke is harmful
D、my mother and grandparents smoked heavily

答案C

解析 阅读全文可知主要是讲吸烟和被动吸烟的危害。
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