Choose the correct answer.

1. A: How's it going?
B: ...
a Not too bad. And you?
b To the park with my dog.

2. A: What do you think of rock climbing?
B: ...
a I find it very excited.
b I find it very exciting.

3. A: You're looking very well.
B: ...
a Thanks, so are you.
b Thanks, so am I.

4. A: Do you enjoy surfing the Net?
B: ...
a I'm fine.
b I'm really into it.