The substance can be added to gasoline to accelerate the speed of automobiles.（　）

题库:综合类 类型:最佳选择题 时间:2017-07-03 03:10:25 免费下载:《简单单选》Word试卷

The substance can be added to gasoline to accelerate the speed of automobiles.（　）
A.quicken
B.shorten
C.loosen
D.enlarge

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