He paid for a seat, when he _____ have entered free. A．couldB．wouldC．mustD．need
题型：不详难度：来源：
He paid for a seat, when he _____ have entered free. | A．could | B．would | C．must | D．need |
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答案
| A。 |
解析
| could have done的意思是“本来可以做某事”。句子语境为“虽然他本来能够免费入场，但他买了票”。 |
举一反三
—Catherine, I have cleaned the room for you.
—Thanks. You _____it. I could manage it myself. | A．needn’t do | B．needn’t have done | | C．mustn’t do | D．shouldn’t have done |
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This cake is very sweet. You ______ a lot of sugar in it. | A．should put | B．could have put | C．might put | D．must have put |
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When we worked in the same office, we _____ often have coffee together.| A．would | B．should | C．could | D．ought to |
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---Who has made a mess in my room?
---Who else it but your naughty son?| A．could do | B．could have done | C．did | D．has done |
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---Good morning，Doctor Brown’s office.
---Hello, this is Tom Smith. Could you please tell Doctor Brown I ?
My car start.| A．was delayed, doesn’t | B．will be delayed, won’t | | C．am delayed, didn’t | D．would delay, mustn’t |
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