1 A: Why are your clothes dirty?
B: Because I have been working in the garden all morning.
2 A: Why are you upset?
B: Because I have lost my car keys.
3 A: Would you like some homemade cake?
B: Yes, please. It smells delicious.
4 A: Are you busy?
B: Yes. I have been working on this project all day and I still haven’t finished.
5 A: Who had been using my MP3 player?
В: I have.
6 A: What’s that noise?
B: Jason is having a birthday party.
7 A: What do people wear on Remembrance Day?
B: A little red paper poppy.
8 A: Did you find a dress for the prom night?
B: Unfortunately, not yet.