Likewise, when the 40 m.p.h. speed limit was on a number of roads in London in the late fifties, there was a 28 percent reduction in serious accidents. ( 章节：1 难度：2)_做题室

单项选择题Likewise, when the 40 m.p.h. speed limit was on a number of roads in London in the late fifties, there was a 28 percent reduction in serious accidents. ( 章节：1 难度：2): A、proposed; B、imposed; C、supposed; D、composed

正确答案：B
答案解析：
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