Because of the rising cost of fuel, scientists are building automobile engines w

游客2023-12-01 95

问题 Because of the rising cost of fuel, scientists are building automobile engines who will conserve gasoline but still run smoothly.

选项

答案 who—that／which

解析译文：因为燃料价格的不断上涨，科学家们正在制造一种能节省石油却又运行平稳的汽车发动机。
分析：考查定语从句的引导词。定语从句的先行词engines是物而不是人，指代先行词的引导词不能用who，而应改为that或which。

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