A:Can I use your sharpener?
R: Sure, but please clean it after you use it
A: Alright ! Thank you !
B: Do you think I could borrow your notebook to copy our last lesson?
L: Sure, you were sick in that day and you need to take the lesson, but promise me that you would return my notebook soon !
B: I promise you.
M: Can I use your phone to make a call? Mine isn't working..
N: Of course you can ! You are my deskmate !
M: Oh, dear god, thank you !
