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Since the new prohibition of drunk drivi...

Since the new prohibition of drunk driving_____, the number of accidents in the area has fallen sharply.

A. has been introduced  B. introduced

C. was introduced   D. has introduced

 

C 【解析】 试题分析:考察时态。这是一个Since引导的时间状语从句。Since多用在表示过去的时态,意思是自从。因为该醉驾禁令是被引发布,所以要用被动语态。该句意思为:自从新的醉驾禁令发布,该区域的事故数锐减。故选C 考点:考察时态。  
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