Scientists say that many factors ______ changes in the weather.

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问题 Scientists say that many factors ______ changes in the weather.

选项 A、bring in
B、bring off
C、bring about
D、bring forward

答案C

解析 bring about“造成”,“引起”;bring off“完成”,“使成功”;bring in“收(庄稼)”,“引进”;bring for ward“提出 (建议、论据等)”,“把……提前”。只有C符合题意。
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