I _____ have watched that movie --- it’ll give me horrible dreams.A．couldn’tB．ne

题型：不详难度：来源：

I _____ have watched that movie --- it’ll give me horrible dreams.

A．couldn’t

B．needn’t

C．shouldn’t

D．mustn’t

答案

解析

这题考查情态动词的完成式表示虚拟语气的用法，shouldn’t have done 是本不该做却做了，符合句意：我本不该看那场电影的，它让我做恶梦。couldn’t have done一定不可能做… needn’t have done本不必做…而做了，must只能用肯定式表示推测。

举一反三

— I want someone to write the composition for me.
　— No! It’s a rule in our school that as a student, you _______ depend on yourself.

A．shall

B．will

C．can

D．should

题型：不详难度：| 查看答案

— I haven’t got the reference book yet, but I’ll have a test on the subject next month.
— Don’t worry. You ________ have it by Friday.

A．could

B．shall

C．may

D．must

题型：不详难度：| 查看答案

I was really anxious about you. You _______ home without a word．

A．mustn’t leave	B．shouldn’t have left
C．couldn’t have left	D．needn’t leave

题型：不详难度：| 查看答案

I ______ her, but I never could.

A．ought to help	B．must help
C．ought to have helped	D．must have helped

题型：不详难度：| 查看答案

—Hi, Johnson, any idea where Susan is?
—It"s class time, so she in the classroom now.

A．can be

B．must have been

C．might have been

D．should be

题型：不详难度：| 查看答案