He wanted to go,but he A wasn`t able to Bwasn`t able to go C wasn`t able Dcouldn`t be able to
选A
首先can和be able to不能连用,所以不选D
其次 could通常表示一种婉转语气,而不是can的过去式
要表示过去做了某事,通常用be able to