2019年mpa考试英语真题——连词202

{01}________ you understand this rule, you’ll have no further difficulty. A.Once B.Unless C.As D.Until 解析：once引导的让步状语从句，意为“一旦”。句意为“一旦明白了这条规则，就再也没有困难了”。
本题选A。
{02}______ private cars are bringing us convenience, they also cause more traffic accidents and pollution. A.While B.As C.If D.Since 解析：此题用意是考查连词的用法。两分句之间存在转折关系，而此处while 相当于although，意为”虽然”。
本题选A。