题目内容

The invention of steam engine greatly sped up the industrial revolution, which ________ a lot to the take-off of the world.
A.turnedB.contributedC.constructedD.exposed
B

试题分析:句意:蒸汽机的发明极大地加速了工业革命的进程,这对世界的腾飞有很大贡献。A. turned使变成,转动;B. contributed 贡献,有助于;C. constructed构造,建造;D. exposed 暴露,揭露。根据句意选B。
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