29 .C (Dựa vào câu đầu tiên đoạn 1: Smoking causeslung cancer(Hút thuốc gây ra ung thư phổi )

30, D (Dựa vào câu 3 đoạn 1: Smoking is also the leading cause ofmouth cancer, tongue cancer, and throat cancer)

31, C (Dựa vào câu cuối đoạn 1:  Smoking causes one millionearly deathsin the world every year)

32, B (Dựa vào câu trong đoạn 2: Smokers breathesmokeout into the air. They breatheitout on their children and their wives or husbands. )

33, B (Dựa vào câu cuối đoạn 2: Children whose parents smoke have more breathing and lung problems than other children. Women who are married to smokers are more likely to have lung cancer than those married to non-smokers. )

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