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18.-He is supposed to turn up at 6,but…
-Here they are.I ___see their car.(  )
A.am able toB.canC.mightD.should

分析 --他应该6点钟到达,但是…
--他们在这儿.我能看到他们的车子.

解答 答案是B.本题考查情态动词的区别.be able to 表示"经过努力之后能够…"; can表示"能够(本能);可能(推测);可以(请求许可)等";might表示"也许";should表示"应该;万一;竟然'";根据句意是"我能看到",不强调努力,所以答案是B.

点评 要在正确理解情态动词的基本含义的基础上,整体理解语境中的情感态度,做出合理的判断

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