问题

happened to the young trees we planted lastweek—The trees _ well,but I_ them.
A:might grow; hadn'twatered
B:needn't have grown; didn't water
C:would have grown; didn'twater
D:would grow; hadn't watered
B:needn't have grown; didn't water
C:would have grown; didn'twater
D:would grow; hadn't watered
正确答案是: