He ________ the exam, but he was too careless. A．could have passed B．couldn’t have passed
He________theexam,buthewastoocareless.A．couldhavepassedB．couldn’thavepassedC．musthave...
He ________ the exam, but he was too careless. A．could have passed B．couldn’t have passed C．must have passed D．may have passed
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| A |
| 试题分析：此处could have passed the exam表示本能通过考试，实际上没有。句意：他本能通过考试的，但是他太粗心了。 |
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