【题目】Little did the teacher imagine that a student good at maths _____ have failed in the exam．
A． might B． should C． need D． would
在线课程【答案】B
【解析】might have done过去可能做某事；should have done本来应该做的事却没做；need have done有必要做的事却没做；“will(would) + have + 过去分词”的结构表示对已经完成的动作或事态的推测。句意：老师没有想到数学尖子生竟然考试不及格。