2019年mpa考试英语真题——连词745

{01}I was on the highway _______ this car went past followed by a police car. They ______ at least 150 kilometers an hour. A.when; should have been driving B.while; would have driven C.as; could have driven D.when; must have been driving 解析：考查连词和情态动词用法。因为go past（经过）是短暂性动词所以不能与while连用，while只能和延续性动词连用。When既可以与短暂性动词也可以与延续性动词连用。第二空表示对过去某时正在发生情况的肯定推测。句意：当一辆汽车从我旁边经过，后面跟着一辆警车的时候，我正在高速公路上。他们当时的速度至少150公里每小时。
本题选D。