Medical statistics have shown that the widespread use of cigarettes ______to the

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问题 Medical statistics have shown that the widespread use of cigarettes ______to the increase of cancers.

选项 A、refers
B、confines
C、owes
D、contributes

答案 D

解析本题考查动词短语的含义。A参考，指的是；B限于；C归功于；D有助于，起作用。该句的大意为：医学研究表明人们普遍吸烟导致癌症患者人数增加。

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