1. Do you do any volunteer work?

Question

How about your friends?

2. Yes, I do. They do volunteer work, too.

3. No, I don't. They don't do volunteer work, either.

(Are the answers grammatical?)

4. Do you do any volunteer work?
5. Are you doing any volunteer work?
(Which question is normal?)

Answer 1

#s 1 - 3 are perfect! Congrats!!

Both 4 and 5 are used about equally, I think. The first is asking the question in general. The second is asking if you are doing volunteer work right now.