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27.Put the verbs in brackets into the correctpassive or active tense.

Coffee 1) ...10 said... (say) to originate from Kaffa in Ethiopia and most species of coffeeplant 2)...........................................(find) in thetropics of the Eastern Hemisphere. Thespecies which 3).............................(think)to be the earliest coffeeplant 4)................................................(ever/cultivate) by man is

Coffeaarabica. Today it 5).....................................(grow) mostlyin Latin America.The coffee shrub 6)....................................(reach) a height of8-10 metres and 7) ............................... (have) white scented

flowers. It 8)....................................(produce) a red fruit which9)..............................(call) a cherry. The cherry 10)....................................(contain) two seeds which 11)....................................(join) together. These seeds, which 12)........................................(also/know) as beans, 13).........................................(first/roast)and then they 14)................................(grind) to make coffee.The grounds 15)...........................................(then/process) in a

variety of different ways. Sometimes they 16)..............................(filter) and sometimes they 17) ................................ (soak) inwater to make the drink which is popular with so many people. Coffee is available as grounds or as instant coffee powder and18) .............................. (drink) by one third of the world'spopulation.

28. Rewrite the sentences in the passive.

1 I made this omelette with onions and cheese.

...This omelette was made with onions and cheese,..

2 Everyone considers her to be the best student in the class.

……………………………………………………………………………………………………………………………………….

3 Mary wants someone to help her when she paints the house.

……………………………………………………………………………………………………………………………………….

4 They will have built the new bridge by the end of ft year.

……………………………………………………………………………………………………………………………………….

5 People ask Eve questions about her job all the time

……………………………………………………………………………………………………………………………………….

6 The detective had collected all the information before he handed in his report.

……………………………………………………………………………………………………………………………………….

7 Do people expect Jane to get a promotion this year?

……………………………………………………………………………………………………………………………………….

8 Frank doesn't like people telling him what to do.

……………………………………………………………………………………………………………………………………….

9 They washed the car with soapy water.

……………………………………………………………………………………………………………………………………….

10 Who will make the speech tomorrow?

……………………………………………………………………………………………………………………………………….

11 What did they decorate the streets with?

……………………………………………………………………………………………………………………………………….

29. Put the verbs in brackets into the correct passive tense.

Do you think Mars 1) …...will be colonised……... (colonise) byhumans one day? The planet Mars 2) ......................................................(know) as 'the red planet'. The soil there is red and itssurface 3)................................. (cover) in volcanoes. Until recently, it 4)..............................(believe) that nothing

could live on Mars, but during a recent space mission,tests 5) ................................... (carry out), and now it6)................................... (think) that life on Mars mightbe possible one day. During the space mission, specialequipment 7) ............................................................ (use) to examine theplanet. No form of life 8)................................ (find) yet,and so far, the planet 9)....................................(consider)unsuitable for inhabitation. However, we 10).................................................... (tell) by scientists that, by 2020, humans

11).............................(send) to Mars, and that one day,special cities12) .................................. (build) so that wecan live there. It 13) ........................... (hope) that by2150, Mars will be a wonderful place to live. If a colony14)......................(build) on Mars, would you like to livethere?

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