`9`. Minh has collected stamps since 2000.
`10`. She started to work as a secretary 5 years ago.
`->` She has worked as a secretary for 5 years.
`11`. I haven't read that book since September 20th.
`12`. An has cared about healthy eating for 3 years.
`13`. We have washed this car since 8 this morning.
`14`. We have lived here for fifteen years.
`15`. Minh has collected stamps since 2000.
`16`. She has learnt English for 8 months.
`17`. They have worked for the enterprise since 2002.