答案解折本题考查虚拟语气。本句的从句是对过去的事实进行虚拟，从句中应该用过去完成时。Had he gone前面省略了If,原句应是：If he had gone...-Yao Ming and Yi Jianlian have finished their season in NBA this year.-Yes.They____better but for the injuries.
could have done
can do
couldn't have done
can't do
本题考查虚拟语气。句意：要不是受伤的话，他们本来能够做得更好。