1. When he (arrive) ............, my mother was cooking dinner
2. He (not finishe)............ his project yet.
3.(you/post) ............. the letter yet?
4.Jenny (leave)............. school in 2000
5. We (go) ............. to a concert since 2000
6. I (buy)...............the computer two years ago
7. Last night I ( lose).............. my keys. I had to call my roommate to let me in.
8. I(lose)............... my keys for hours. Can you help me look for them?
help me :(((((((((
1. arrived
2. hasn't finished
3. Have you posted
4. left
5. have gone
6. bought
7. lost
8. have lost