Complete the answers

1. A: Are you a student?
   B: Yes, I [am|do].
2. A: Can you swim?
   B: No, I [don't|can't]
3. A: Are Mary and Chris your friends?
   B: Yes, they [are|can].
4. A: Do you speak English?
   B: Yes, I [am|do].
5. Can you sing like a bird?
   B: Yes, I [can|do].