单项选择题

According to the passage, cancers may take some healthy steps other than ______.

A.stop smoking
B.exercise regularly
C.take non-fat diet
D.control their weight
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单项选择题
The underlined word thwart (Para. 1) most probably means ______ .
A.destroy
B.forbid
C.cure
D.prevent
单项选择题
______ percent of all cancers could be averted if people ate more fruits, vegetables, and plant-based foods and minimized high-fat, high-calorie edibles.
A.30—40
B.40—50
C.50—60
D.60—70
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