1 Because I have been working in the garden all morning.

2 Because I have lost my car keys.

3 Yes, please. It smells delicious.

4 Yes. I have been working on this project all day and I haven't finished it still.

5 Who have been using my MP3 player?

6 Jason is having a birthday party.

7 What do people wear on Rememberence Day?

8 Have you found a dress for the prom night?