Trees are important. We need trees because they give us fresh air. Fresh air is good for our 1 . Doing exercise in parks with lots of trees keeps us healthy. Fresh air 2 us feel energetic (充满活力的) too. Animals also need trees. They are homes for birds. Birds build nests in trees for a resting place. Trees are also important homes for other animals, such as monkeys, squirrels and koalas.
Trees are 3 . We get wood from trees and we use it to make paper. We need paper to write letters and print books. We can also use wood to build houses and make furniture (家具). Trees can also give us fruit. A lot of fruit grows 4 trees, such as apples, lemons, oranges and pears. Eating fruit is good for us.
We should protect trees and 5 more trees on the Earth.
