问题
选择题
Mary seems _______ the bad news, for she looks nice and happy.
A.not to have learned
B.not to be hearing
C.not having learned
D.not to be
答案
答案:A
题目分析: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。