1 Read and Find Out部分答案
Match the causes with the results.
1-b ；2-d ；3-e ；4-a； 5-c
Write out some other uses of forests.
(答案仅供参考)
3.They give us a lot of oxygen.
4.They can change the temperature of the whole world.
5.They can help to reduce the pollution.
2 Write the number部分答案
abcdef642315
3 Answer about You部分答案
（答案仅供参考）
1.I will go to Dalian on vacation this year.
2.I will take the camera.
3.I will swim in the sea.
4.I will buy some souvenirs.
4 Talk about the Future部分答案
(答案仅供参考)
-There will be fewer trees. -I hope not.
-Earth will get hotter. -I hope not.
-Cars will fly. -I hope so.
-People will have more free time. -I hope so.
-More people will use computers. -I hope so.
-More peopie will travel in space. -I hope so.
-Robots will do chores. -I hope so.
-There will be less fresh water. -I hope not.