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a. hoursb. days
2.Water covers about _____ of the Earth.
a. 70%b. 50%
3.About _____ of the water on Earth is ‘fresh’.
a. 10%b.2.5%
reservoir 水库
1.1
Warm-up
Quiz about water
1.1
Warm-up
Quiz about water
Water Cycle
Water falls from the clouds
as rain.
11
It falls as rain again.
It runs into the sea.
It rises from the sea to the sky.
It runs into rivers.
2
3
4
5
2
Pre-reading
3
Pre-reading
Questions in the article.
2.1