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问三道英文语法的解析31.Of all the clues they provided,______ is of any

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问三道英文语法的解析
31.Of all the clues they provided,______ is of any help for solving the case of robbery.A.nothing B.neither C.none D.no one
32.In extreme weather,a worn tyre can break easily ______ it’s mended,as is often the case.A.when B.where C.which D.that
33.______ once every two years,whether it is a car,a bus or a lorry,is the rule that all drivers must obey in our country.
A.Having been examined B.Examined
C.Examining D.Being examined
31.C 32 B 33D
31.C.前面出现了 Of all the clues,说明线索至少有三条,所以先排除 neither(两者都不).none (of the clues) 这些线索中一条都没有,none 既可指人,也可指物.nothing(什么东西都没有).no one(没有一个人).
32.B.where 引导地点状语从句,全句意思:在极端天气下,经常的情况是,一个磨破了的轮胎很容易在修补过的地方爆胎.
33.D.Being examined 是-ing 的被动形式作主语.句子意思:不论是小汽车,公共汽车,还是货车,每两年检查一次是这个国家的所有司机都必须遵守的一条规则.其它选项不正确,B 项过去分词不能作主语;A 项时间不恰当,是-ing 的完成式;C 项语态不正确.所以只能选 D.