1.Where is your key?- I don’t know, I (lose) have lost it
2.Where is Ken?- He ( go) has gone out. He’ll be back in about an hour.
3. They are still building the new road. They (not/ finish) haven't finished it.
4.When I (get) got home last night, I (be) was very tired and I (go) went to bed.
5. Mr. Clark (work) has worked in a bank for 15 years.
6. I don’t know Carol’s sister. I (never / meet) have never met her.
7. I wanted to phone Diane last night but I (forget) forgot .
8. I (buy) bought a new house last year, but I (not sell) haven't sold my old house yet.
9. Ann (go) went to Canada six months ago. She (work) has worked in Canada for 2 months and then (go) went to the USA.
10. My uncle just (open) has just open a new internet house on Tran Phu street.