NUMBERS b) Complete the sentences. Use: prevent, save, raise, reduce, ban, fine, invest. 1 The best way to stop the polar ice caps shrinking is to energy 2 We should methods of disposing waste factories that don't use alternative 3 To fight climate change, we can .. .. the amount of electricity wo use the hole from getting bigger by not buying aerosol sprays that use CFCs 4 We can 5 The government should 6 Governments need to ... cars from the city centre. in wind power and solar energy projects 7 We ought to conservation projects. money for charities that run

I (listened) to the radio while Mary (was cooking) dinner.
Did you (buy) this book yesterday?
Last Friday Jill (went) home early because she (wanted) to see a film.
When does your brother usually (get) home in the evening?
Jane always (brings) us a nice present.
What are those people (doing) in the middle of the road?
Have you (read) this book?
While Fred (was sleeping), Judy (was watching) TV.
When I (was) young, I (thought) Mary (was) nice — but now I (think) she’s fantastic.
Jill (was walking) home when she (saw) her husband’s car outside the cinema
Look there! Sue and Tim (are running) to school.
Jack’s father (does not work) in London — he (does not speak) English.
Joe (bought) a car yesterday.
Their father often (goes) to rock concerts.
While you (were sleeping), mother (arrived).

1) We arrived at last. The children saw the river and immediately ran to the water. 2) In 2009, when I bought a new computer I understood how easy our life can be. 3) A minute ago Colin goodbye and left the room. 4) Jack told me he would go with us next time. 5) It was Sunday. I WALKED in the park when I met my old friend there. 6) It was the best film I have ever seen. 7) We couldn`t go to France as we have not received a visa. 8) The day was rather hot. The old lady was sitting on the bench for half an hour and then fell asleep. 9) Believe me, I know Jim very well. I know him for forty years. 10) Listen, Jack, what have you been doing here for three days?