Viết lại các câu dưới đây với “since” hoặc “for”,sử dụng thì hiện tại hoàn thành

Bài 9:Viết lại các câu dưới đây với “since” hoặc “for”,sử dụng thì hiện taj hoàn thành.
1. I/have/this computer/three years.
                                                                                                                              .
2. They/live/Da Lat/last year.
                                                                                                                               .
3. She/be/happy/she had the mobile phone.
                                                                                                                               .
4. We/learn/French/a month.
                                                                                                                                .
5. She/work/in this school/2012.
                                                                                                                                .
6. I/use/computers/5 years.
                                                                                                                                .
7. The washing machine/stop working/this morning.
                                                                                                                                .
8. They/know/her a long time.
                                                                                                                                .
9. He/read/this/novel/9 o’clock.