Trees are useful to man in three important ways. The first important way is that they prov

Trees are useful to man in three important ways.
The first important way is that they provide(提供) us food, wood and other products(产品). Trees provide food not only for man, but also for many animals. 61. Without trees, many animals cannot live on the earth.
The second important way is that trees give us shade(阴凉). On a hot summer day, people hope to have a rest under the tree after they have a long walk.
The third important way is that trees help to prevent droughts(干旱) and floods(洪水). However, in many parts of the world, man doesn’t know about the third way. They cut trees in large numbers. In the end they will find that they lose one of their best friends.
根据短文内容，完成下列任务。
任务一：翻译句子。
【小题1】把文中的画线句译成汉语。
    
任务二：回答问题。
【小题2】How many important ways are trees useful to man?
    
【小题3】On a hot summer day, what do trees give us?
    
【小题4】What does“one of their best friends” refer to(所指)?
    
任务三：写出恰当的英文标题。
【小题5】    没有树木，很多动物就不能在地上生存。