We expect the measures to control traffic jam, ____ taken by the Traffic Department, will come into.

A.as B. when C. since D. after答案为A。为什么？B为什么不对？

热心网友

答案为b.如 When I press the button,the light will be on or out.此时两个动作几乎同时发生．

热心网友

这个题目是考察定语从句中的as代指句子整个内容的特殊用法这个句子我们可以从心来调整一下结构：we expect the measures taken by the Traffic Department to control traffic jam,as will come into句子结构调整以后更容易理解：taken by the Traffic Department是过去分词做定语来修饰measures,指交通局采取的措施，to control the traffic jam做目的状语指为了控制交通拥挤，所以前半句的意思：我们希望交通局会采取一些措施来控制交通拥挤的状况，后半句as代指前半句

热心网友

此题考查定语从句的用法，此中“the measure”为中心词，而as（相当于which is）作为先行词而使用。全句的意思是：我们期待由交通部门所采用的控制交通拥挤的方法手段能实现。此句可变形为：We expect the measures _which is___ taken by the Traffic Department to control traffic jam will come into.