问题补充:
John went to the hospital alone. If he me about it, I would have gone with him.
A. tells
B. told
C. should tell
D. had told
答案:
A. tells
B. told
C. should tell
(答案→)D. had told
解析:根据上文约独自去了医院。如果他告诉了我,我会和他一起去的。从语境来看,条件从句中假设的是在汤姆去医院之前发生并且完成的事情,故用过去完成时态,选D。