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教学过程：
Step 1 Pre-reading
Enjoy a video about the Earth
(PPT)The Earth is sad. We can do something to protect the Earth. (Learn: protect)
Step 2 While-reading
Watch the cartoon
Q: How can we protect the Earth?
(Learn: save, energy,plastic)
Save water Save energy Save trees
Don’t use too much plastic
Passage 1 Save water
Look and say
Q1: What do we use water to do?
(Learn:use … to …,useful)
Q2: (PPT) Can we use water like him? (Learn: waste)
Listen, read and think
Q:What should we do?
We should reuse and save it. (Learn: reuse)
Read the passage
Think and write
Passage 2 Save energy
Watch the cartoon and try to know more about energy
(2) Read the passage(Learn: so much)
(3) Think and write
Passage 3&4 Save trees, Don’t use too much plastic
The students learn by themselves
Task 1 Read and circle
Task 2 Discuss in pairs
Task 3 Think and write
Task 4 Read the passages