2019年mpa考试英语真题——虚拟语气755

{01}The light is still on. They ___ to turn it off when they left the room. A.must forget B.could have forgotten C.may forget D.must have forgotten 解析：考查虚拟语气。结合上文，灯仍然亮着，可知是对过去的事情的推测。“must+have+done”表示对过去事情的肯定推测；“could+have+done”表示对过去事情的假设。结合题意可知下文是推测语气，故选D。
本题选D。
{02}—How did your mathematics exam go？
—I thought I           ，but in fact I fell behind in the class. A.should have been the top 10 B.could have been the top 10 C.may have been the top 10 D.need have been the top 10 解析：考查虚拟语气。句意：你的数学考试怎么样？——我认为我能进前十名，但是实际上我在班里名落孙山。表示对过去事情的假设，意思是本来能够做某事而没有做，用“could+have+done”，故选B。
本题选B。