问题补充:
Had he studied harder, hethe final exams.
A. would pass
B. could pass
C. had passed
D. would have passed
答案:
A. would pass
B. could pass
C. had passed
(答案→)D. would have passed
解析:句意:如果他更加努力的学习,他就会通过最后的考试。这里的Had he studied harder,是省略倒装的虚拟条件句,相当于:If he had studied harder,所以主句用would have done,所以选D。