Choose the correct item: 1) We turn off / are turned off the light when we leave the flat. 2) Your luggage will / bring be brought up in the lift. 3) The application form should be filled by / with a pen. 4) She will meet / be met them in the hall upstairs. 5) The patient was operated on / operated yesterday. 6) America was discovered by / with Christopher Columbus. 7) The medicine should take / should be taken three times a day. 8) You should visit / should be visited the Planetarium. 9) The hole was made by / with a knife. 10) The results of the test are announced / will be announced in an hour. III. Change the sentences into Passive Voice:

Junk food has for a long time been eaten by people.  It is considered easy to get and cheap to buy.  Lots of commerciasl every day are broadcast  on the radio and TV. 
I strongly believe that advertizing junk  and unhealthy food should be prohibited.  Doctors say that junk food leads to obesity and serious diseases.  Children like it because it looks nice and smells nice.  But they are not aware of the danger. 
Some people may think that such a ban on junk food advertisement is a  violation of rights.  It also poses danger to freedom of speech and mass media, they may think. 
But I consider that our nation's health is more important.  So we must do all we can to teach people to choose healthy food for themselves and their children. Results of scientific research in this field should be made public.  So the people will  finally make the right choice!