1 Unit 7随堂练习（三）第一题答案
Most；energy comes；coal；oil；earth；save；because
2 Unit 7随堂练习（三）第二题答案
1、What time
2、Does，have
3、shouldn’t use
4、Let’s make a poster and tell them about it.
5、There’s a football game at a quarter past four.
6、What should，not do
7、to have
3 Unit 7随堂练习（三）第三题答案
1、Most of our energy comes from coal and oil.
2、We should not drive so much because cars use a lot of energy.
3、Don’t use too much plastic.
4、World Environment Day is on June 5th.
4 Unit 7随堂练习（三）第四题答案
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