Actually, you should both check on 4th street.  You have q high and he has a pair.   He will have position on you throughout, so you chould check.  And, he has a pair, so he should check.  Of course, when he bets, you should just call on 4th street.  People forget about position in Razz....and they shouldn't.

I learned how to improve my Razz game by reading "Sklansky on Poker" and "Play Razz Poker to Win."

good luck!