Unit8 SectionA(1a-2d)精品教案
I. Presentation
Show the picture of the earth and tell students the earth is polluted now.
For example: (1) The factories that burn coal pollute the air with a lot of black smoke.
(2) Factories put waste into the river.
(3) People should throw away litter in the bin.
(4)There are more cars on the road.