【題目】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

【答案】 C

【解析】

試題分析：考察時(shí)態(tài)。這是一個(gè)Since引導(dǎo)的時(shí)間狀語(yǔ)從句。Since多用在表示過(guò)去的時(shí)態(tài)，意思是自從。因?yàn)樵撟眈{禁令是被引發(fā)布，所以要用被動(dòng)語(yǔ)態(tài)。該句意思為：自從新的醉駕禁令發(fā)布，該區(qū)域的事故數(shù)銳減。故選C

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