Read and choose. （读短文，选择正确的答案）
The students of Red Star school are having a field trip in the forest. They are picking up trash. There are a lot of bottles and tin cans in the forest. In some areas, there aren't many trees. So the students are planting new trees. In the year 2060, these trees will be huge. During the break, the students talk about life in the future. Some students say the computers will do many things, such as shopping and washing clothes, but computers can't plant trees. Now, some people always cut the trees and there are fewer and fewer trees in the world. The students hope people not cut the trees any more.
（1）The students of Red Star school are             in the forest.
A. playing   
B. picking up trash and planting trees
（2）There are many        in the forest.
A. bottles and tin cans  
B. computers
（3）During the break, the students say              .
A. the computers can plant trees.   
B. the computers will do many things
（4）There are fewer and fewer trees now because              .
A. some people always cut the trees.   
B. the students plant trees