* Complete the following sentences with the words given

18. Yesterday/ it/take/my mother/ more than/an hour/ go/ her office.

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19. Many people/ not/ appprove/ using/ nuclear power/ because it/ very dangerous.

=>...............................................................................................................................................

20. We/ trying/ find/ cheap/ clean/ effective/ sources/ energy.

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* Complete the tag questions

15.  You’ve changed your old clothes, ......................................?

16.  Your dad used to be soldier, ..................................?

17. People use solar power for heating or cooling the houses, …………………..?