Ответы
1. I cut some flowers from my garden yesterday. I've (I have) cut many flowers from my garden this summer.
2. I haven't seen Tom lately.
3. The artist drew a picture of sunset yesterday. She has drawn many pictures of sunsets in her lifetime.
4. I fed the birds at the park yesterday. I've been feeding birds at the park every day since I lost my job.
5. Ann woke up late and missed her breakfast on Monday.
6. I forgot to turn off the stove after dinner. I've forgotten to turn off the stove a lot of times in my lifetime
7. The children hid in the basement yesterday. They've been hiding in the basement often since they discovered a secret place there.
8. The baseball player hit the ball out of the stadium yesterday. He has hit a lot of homeruns since he joined our team.
9. We first met in 2001. So we've known each other for 8 years.