  Motivated by recent CELO measurements and the progress of the theory of B
decays, we investigate $B\to P V(P=\pi,K. V= K^{*},\rho,\omega)$ decay modes in
the framework of QCD improved factorization. We find that all the measured
branching ratios are well accommodated in the reasonable parameter space and
predictions for the other decay modes are well below the experimental upper
limits. We also have calculated CP asymmetries in these decay modes.
