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30.They ______ be at home. You see, the door is locked from the outside.
A.can’tB.mayC. mustD. mustn’t

答案
A
解析

核心考点
试题【30.They ______ be at home. You see, the door is locked from the outside. A.can’t】;主要考察你对虚拟语气等知识点的理解。[详细]
举一反三
You_____make such mistakes again.
A.should neverB.should not always
C.would always notD.would not forever

题型:不详难度:| 查看答案
To appreciate that it"s not easy for you, but you ______ try to get here on time.
A.mayB.mustC.willD.can

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If you had worked hard, you ______ so anxious now.
A.are notB.would not have beenC.will not beD.would not be

题型:不详难度:| 查看答案

8.Although this_______ sound like a simple task, great care is needed.
A.mustB.mayC.shallD.Should

题型:不详难度:| 查看答案

15.---Tom is never late for work. Why is he absent today?
---Something ________ to him.
A.must happen B.should have happened
C.could have happened D.must have happened

题型:不详难度:| 查看答案
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