Ex.1
1. Are you Canadian?
Yes, I am. (e)
2. Is it ten o'clock?
No, it isn't. (d)
3. Are they friends?
No, they aren't. (c)
4. Is Elena from the UK?
No, she isn't. (f)
5. Are we in Zacisze Restaurant?
No, we aren't. (a)
6. Am I late?
Yes, you are. (b)