  We drive the cosmological solutions of five-dimensional model with $1/H^{2}$
term $(H^{2}\equiv H_{MNPQ}H^{MNPQ})$, where $H_{MNPQ}$ is 4-form field
strength. The behaviors of the scale factors and the scalar potential in
effective theory are examined.As a consequence, we show that the universe
changes from decelerated expansion to accelerated expansion in Einstein frame
of the four-dimensional theory.
