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  3. Medical research has shown that the widespread use of cigarettes contributes the increase of cancers.

Medical research has shown that the widespread use of cigarettes contributes the increase of cancers.

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问题 Medical research has shown that the widespread use of cigarettes contributes the increase of cancers.
选项 A、towards
B、for
C、with
D、to
答案D
解析 句意：医学研究表明，香烟的广泛使用导致了癌症的频发。本题考查固定搭配。本句涉及固定词组contribute to，意为“有助于”“促成”，填人空格中，题句语义连贯。
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