---Look at these tracks. It _____ be a wolf.” ---Don’t be so sure. I think it _
题型：不详难度：来源：
---Look at these tracks. It _____ be a wolf.”
---Don’t be so sure. I think it _____ be a fox.| A．must; could | B．may; might | C．need; must | D．could; need |
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答案
| A |
解析
| 考查情态动词。Must可表示肯定推测，意为“一定”；could“可能”，表示的可能性没有can大，但比may大。句意“看那些脚印。它一定是一匹狼。”“不要那么肯定。我认为是一只狐狸。”故选A。 |
举一反三
— I can’t find my dictionary anywhere.
— You _____ have lost it while studying in the library.| A．can | B．may | C．would | D．should |
|
—-I’m very sorry. I haven’t brought you the pen you lent me yesterday.
—-Forget it. You not return it to me as I have got an extra one.| A．must | B．need | C．can | D．should |
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I’m most awfully grateful to you. I can’t think what I ________ without you.| A．could do | B．would do | | C．should have done | D．must have done |
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| Holiday shopping __________ be a tiring experience. There are so many places to visit and choices to make. |
After her son’s death, the old lady __________ sit at the window, deep in thought.| A．would | B．should | C．could | D．might |
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