Chuyển các câu sau sang câu bị động

II. ĐỐI SANG CÂU BỊ ĐỘNG
11. Someone introduced me to Dr Felix last year.
( I ………………………………………………………………………………..…………
12. People are destroying large areas of 'forest every day.
( Large areas of forest ……………………………………………
13. Somebody has bought the land next to our house.
( The land next to our house  
14. 'Somebody had already reported the accident before I phoned.
( The accident 
15. People were using the tennis court, so we couldn't play.
( The tennis court 
16. You can buy videos like this one anywhere.
( Videos like this one ..
17. Somebody will tell you when you should go in to see the doctor.
( You ..
18. Has anybody shown you what to do?
(  you ?
19. They should have finished the hotel by the time you arrive.
( The hotel ..
20. Someone has to write the history of the European Community one day.
( The history of the European Comminity …