The police, after searching, concluded that the thief must______ in through the window and______ the silver while the family was asleep.A.e; stealB.have e; have stolenC.have e; stoleD.have e; stolen
网友回答
D解析musthavee用于对过去发生的情形所做出的肯定推断。 第二空只选stolen, 是因为must have e 和 must have stolen 由and 连接, 可以省 去第二个must have, 而不影响理解。