His failure suggested that he   the teacher’s suggestions．
A．can’t have followedB．needn’t follow
C．mustn’t have followedD．shouldn’t follow
A

試題分析：句意：他的失敗表明了他不可能聽了老師的建議。can’t have done不可能做了某事；must表推測不能用于否定句；因為現(xiàn)在已經(jīng)失敗，所以這是對過去的推測，過去沒有聽從老師的建議。故選A。
點評：本題難度適中。情態(tài)動詞的完成式是高中階段的重難點之一，需要考生熟記它們的用法，在各類考試中經(jīng)常出現(xiàn)，它主要用于表示對過去情況進行推測或責(zé)備等。
即學(xué)即練：—Can I have something to eat, Mum? I feel hungry.
You ________ be hungry. You’ve just had some bread and hamburger.
A. mayn’t    B. won’t    C. mustn’t   D. can’t
解析：D。否定意義的推測用can或者could來代替must,表示強烈語氣。
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