问题补充:
—He failed in the exam again.
—He his teacher’s advice.
A. should not have followed
B. should not follow
C. mustn’t follow
D. should have followed
答案:
A. should not have followed
B. should not follow
C. mustn’t follow
(答案→)D. should have followed
解析:考查虚拟语气。句意:他在考试中又不及格。——他应该听从老师的忠告。Should have表示过去该做而没做的动作,故选D。