What evens are they talking about? Complete their conversation. Помогите!! Дам 20 баллов!

—  On holidays I went to a camp. I go there every year.

—  How long have you visited the camp?

—  I've visited the camp since I was 9.

—  Isn't it boring?

—  No, it's not. We do a lot of different things there.

—  What have you done this year?

—  We've sewed soft toys.

—  I don't think that's very interesting.

—  I'm tired.

—  What have you done?

—  We've picked up garbage near the river.

—  How long have you worked?

—  We've worked there for 2 hours.

—  You can sing really well.

—  Thank you.

—  How long have you sung?

—  I have sung in the choir for 4 years