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1.We ____ use public transportation more. *

а)should

б)shouldn't

2.We ____ use environment friendly deodorants. *

а)should

б)shouldn't

3.We ____ cut down the trees. We ____ save them. *

а)should ... should

б)shouldn't ... should

4.We ____ love animals. They are our real friends. *

а)should

б)shouldn't

5.We ____ use coal in houses. It pollutes air very much. *

а)should

б)shouldn't

6.We ____ use filters in factories. We ____ pollute the air. *

а)should ... shouldn't

б)shouldn't... shouldn't

7.We ____ hunt animals. We ____ save them. They are our friends. *

а)should ...shouldn't

б)shouldn't ...should

8.We ____ turn off electric devices when we don't use them. *

а)should

б)shouldn't

9.We ____ use our private cars. Because they pollute air much. *

а)should

б)shouldn't

10.We ____ pour chemicals into our sinks. They pollute water. *

а)should

б)shouldn't

11.We ____ use solar energy more. It's clean and harmless. *

а)should

б)shouldn't

12.We ____ use environment friendly detergents. *

а)should

б)shouldn't

13.We ____ waste paper to save our trees. We ____ recycle them. *

а)shouldn't ...should

б)shouldn't...shouldn't

14.We ____ turn off the tap when we don't use it. We ____ save water. *

а)should...should

б)shouldn't...should

15.We ____ use animals in our experiments. We ____ harm them. *

а)should...shouldn't

б)shouldn't...shouldn't

16.We ____ pour factory wastes into water resources. *

а)should

б)shouldn't

17.We ____ plant more trees. We need them to breathe. *

а)should

б)shouldn't

18.We ____ use electric cars. Because they are clean. *

а)should

б)shouldn't

18.We ____ turn off the lights when we don't need them. *

а)should

б)shouldn't

19.We ____ throw away rubbish. They pollute environment. *

а)should

б)shouldn't

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