I could have called you for help, but I ____ your number. A．couldn’t rememberB．
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I could have called you for help, but I ____ your number. | A．couldn’t remember | B．didn’t remember | | C．should have remembered | D．hadn’t remembered |
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答案
| B |
解析
| could have done 表示过去本可以做某事而没有，是一个与过去事实相反的虚拟语气，but后引出了一个过去事实,说明不能做的理由。故remember用一般过去时。 |
举一反三
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