VII. Change these sentences into Passive voice :
6. The mudslide buried five houses in a village in the eastern region.
_________________________________________________________________
7. The volunteers have rescued three cats.
_________________________________________________________________

8. They are cutting dead trees on some streets to prepare for the forthcoming storm.

_________________________________________________________________

_________________________________________________________________

9. We should move the furniture to higher places because of the flood.

_________________________________________________________________

10. They had repaired their house before the typhoon came.

_________________________________________________________________

V. Complete the passage with the given words in the box.

 EFFECTS OF AIR POLLUTION

There are different kinds of negative and harmful effects of air pollution. Air pollution (1)________________global warming in a great scale. The global warming (2)________________to the increase of temperatures worldwide, the increase in sea levels and the melting of icebergs. It (3) ________________all species on the (4)________________The effects of air pollution are very (5) ________________for health. It causes different kinds of diseases like heart attack, cancer, etc. Every year millions of people of all over the world die due to direct or (6) ________________effects of air pollution. Acid rain is another effect of air pollution. Acid rain can cause great damage to human, animals and crops. Air pollution (7) ________________the wild life. Humans and animals face a lot of serious effects due to air pollution. Toxic chemicals present in the air can force wildlife species to (8) ________________to new place and change their habitat. The toxic pollutants over the surface of the water can also affect sea animals. It is right time to (9) ________________our environment. To create a better place to (10)________________we have to stop the air pollution. 

IV. Put the verbs in brackets into the correct form:

1. They (come)_______________back home after they (finish) ______________ their work.
2. She said that she (meet) ______________________ Mr. Bean before.

3. Before he (go)__________________ to bed, he (read) ___________________ a novel.
4. If I (know) ____________________ his telephone number, I’d give it to you.

5. If he worked more slowly, he ____________________ (not make) so many mistakes.

6. I shouldn’t drink that wine if I ____________________ (be) you.

7. A lot of people _____________________ (be) out of work if the factory closed down.

8. Who (look after) _______________ the children when your sister (be) __________ away?

9. Canada (be)____________made up of 10 provinces and three territories.

10. Australia (have) ________________ a range of different landscapes, including urban areas mountain ranges, desserts and rain forests.

III. Find and correct mistakes.
1. The fish are dead because the polluted water.
     A            B               C                  D
2. Ships spill oil in oceans and rivers led to the die of many aquatic animals.
       A                                B                             C                        D
3. Land pollution happens when human activities destroy Earth’s surface.
              A                 B                                   C                        D
4. She has found that nobody can help her if she did not try her best to do it herself.
                  A                                  B                            C                        D
5. Unless there had been the heavy storm, the climbers will not have died.
         A                    B               C                                      D

12. When a typhoon happened, many houses and roads _________ destroyed or flooded.

  A. is                               B. are                               C. was                    D. were

13. Last year, there was a big typhoon in my area. It caused extensive damage to our _____. 

A. property                      B. furniture                      C. wealth               D. savings

14. The government sent rescue food, drink and medical supplies to ________ homes.

A. flood                           B. flooding                      C. flooded              D. floods

15. All people who were without homes in the flood were provide with ________ accommodation.

A. short                            B. temporary                    C. present              D. instant

16. When the earthquake happened, almost people in this building managed to run ____of it.

A. quickly                        B. fast                              C. smoothly          D. out

17. ________ is the most common natural disaster in your country? --- Snowstorms.

A. What                           B. Which                         C. How                  D. Do

18. The___________ buried the whole village while people were sleeping in their houses.

A. mudslide                     B. tornado                        C. drought             D. thunderstorm

19. ________workers were sent to the area immediately but no villager was survived when the landslide happened.

A. Rescue                        B. Help                            C. Assistance         D. Volunteer

20. What _______ we do to prevent these natural disasters?

A. may                             B. ought                           C. should               D. be able