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Размещено 13.09.2016 19:19:37

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Exercise7. Read the following sentences, underline the main verb and state the verb: Active or Passive.

1.Railroads were developed in the 19 century and became the

principal means of transportation.

2.Various forms of public transportation were dominant in the hundred years

3.The ‘urban transportation system’ is grouped into three categories

4.Smog remains a problem in more than 100 cities.

5.For decades there has been talk about ‘urban transportation system

6.Raifroads have been largely replaced by automobiles and aviation.

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