题目内容
His failure in the exam suggested that he __________ the teacher’s instructions.
- A.can’t have followed
- B.needn’t have followed
- C.mustn’t have followed
- D.shouldn’t have followed
A
解析:
can用于否定句和疑问句;肯定句中用may。
解析:
can用于否定句和疑问句;肯定句中用may。

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