问题补充:
My sister for long when she fell seriously ill.
A. didn’t marry
B. has been married
C. hadn’t been married
D. wasn’t married
答案:
A. didn’t marry
B. has been married
(答案→)C. hadn’t been married
D. wasn’t married
解析:句意:我姐姐结婚不久以后她就得了严重的病。因为结婚是在生病前发生的,是过去的过去的动作,用过去完成时,选C。