15. She has written to me for 5 years -> she began.....
16.I started to do that puzzle an hour ago -> I have.......
17.They began working in this shop 9 years ago -> They have...............
18.I began to play Piano in 2009 -> I have..........
19. They have taught in this school since 2007 -> They started..............
20.She has never been so unhappy before -> this is the first time..............
15. She has written to me for 5 years -> she began.....writing to me 5 years ago
16.I started to do that puzzle an hour ago -> I have.....done that puzzle for an hour..
17.They began working in this shop 9 years ago -> They have..worked in this shop for 9 years.............
18.I began to play Piano in 2009 -> I have...played piano sknce 2009.......
19. They have taught in this school since 2007 -> They started..teaching in this school in 2007............
20.She has never been so unhappy before -> this is the first time..i.....have been so unhappy.......
