题目内容
—Mary broke up with me!
—You____ have forgotten about the Valentine's Day．
| A．shouldn't | B．couldn't | C．needn't | D．mustn't |
A
解析试题分析：考查情态动词的完成式用法：shouldn’t have done本不该做而做了，couldn’t have done过去不可能做了，needn’t have done本不必做而做了，must如果接完成式要用肯定，句意：--玛丽和我分手了。--你不该忘记情人节。选A。
考点：考查情态动词的完成式
点评：情态动词的完成式有两种用法：一种是对过去情况的推测，一种是对过去的虚拟，做题时要结合上下文来判断。还要注意情态动词的语气。
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----Mary broke up with me!
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