Linh is my close friend. We (know) each other for 5 years

6. Linh is my close friend. We (know)             each other for 5 years.
    7. You ever (do)            volunteer work?
    -Yes. I (do)            volunteer work last month.
    8. I (collect)        hundreds of old books and clothes for street children so far.
    9. My sister wants to raise funds for street children so she (make)        hundreds of postcards to sell them.