1.He was too tired and could not longer walk on.
问题描述：
1.He was too tired and could not longer walk on.
2.We have to hurry up because we have little time leave
3.A lot of animals are in a danger around the world.
4.Twenty years ago,people in this village lived hard life
5.Though he has been in this city for three months ,he is still not used to live here
6.The young man devotes most of his free time to help others.
答
1.He was too tired and could not(no) longer walk on.2.We have to hurry up because we have little time leave(left)3.A lot of animals are in a(去掉） danger around the world.4.Twenty years ago（before）...