— Where is John?   — He _____ in the library.A．should be B．must beC．can be D．mu

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— Where is John?   — He _____ in the library.A．should be B．must beC．can be D．mu

题型：不详难度：来源：
— Where is John?   — He _____ in the library.
A．should be B．must beC．can be D．must have been

答案
B
解析
must do表示对现在的事实进行推测。
举一反三
One ought _____ for what one hasn’t done.
A．not to be punishedB．to not be punished
C．to not punishedD．not be punished

题型：不详难度：| 查看答案
If you really want yourself to be in good health, you must ___ always ___ so much.
A．not; be smokingB．not; have smokedC．not; to smokeD．be not; smoking

题型：不详难度：| 查看答案
With so much work on hand, you _____ to see the game last night.
A．mustn’t goB．shouldn’t go C．couldn’t have goneD．shouldn’t have gone

题型：不详难度：| 查看答案
Most of the students felt rather disappointed at the English party. They say that it ______ better organized.
A．had beenB．had to beC．must have beenD．could have been

题型：不详难度：| 查看答案
I’m surprised that he _____ in the exam.
A．should failB．would have failed C．may have failed D．should have failed

题型：不详难度：| 查看答案
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