Bài 3
1 C
2 E
3 B
4 A
5 D
Bài 4
1 If we pollute the air,we will have breathing problems
2 If people pollute the water, a lot of fish will die
3 If we cut down trees in the forest, there will be more floods
4 If the soil is polluted, plants will die
5 Is there is noise pollution, people and animals will have hearing problems
Bài 5
1 you will help reduce air pollution.
2 you will save trees.
3 the sea level will rise.
4 children will help the environment.
5 you will have to turn off all the lights before going out.
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