题目内容

Mary seems _______ the bad news, for she looks nice and happy.  
A．not to have learnedB．not to be hearing
C．not having learnedD．not to be
A

试题分析：考查不定式用法。不定式的完成式表示该动作发生在谓语动作之前，否定式是在不定式符号前面直接加not.句意：Mary似乎还不知道那个坏消息，因为她看上去很开心。故A正确。
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