After three days he went to the mountains(改为将来时态)
问题描述：
After three days he went to the mountains(改为将来时态)
______ three days he is ____ to the mountai.
答
In going
In+时间段表示多长时间之后,而既然是将来时,go要么是will go要么就进行时表将来,根据题意,应选用后者