1.Because he wants to plant a beautiful forest for people to change the large land without living things.
2.Only some.
3.Because the land was covered with a beautiful forest two miles wide and five miles long.
4.25 years later the young traveler is no long young.
5.那位游客站在那儿回想过去这里寸草不生一片死寂的画面.
(答案不唯一)