  Within the framework of QCD light-cone sum rules (LCSR), we calculate the
form factor for $B{\to}D l\tilde{\nu}$ transitions with chiral current
correlator. The resulting form factor depends on the distribution amplitude(DA)
of the $D$-meson. We try to use three kinds of DA models of the $D$-meson. In
the velocity transfer region $1.14 < y < 1.59$, which renders the Operator
Product Expansion (OPE) near light-cone $x^2=0$ go effectively, the yielding
behavior of form factor is in agreement with that extracted from the data on $
B\to D l\tilde{\nu}$, within the error. In the larger recoil region $1.35 < y <
1.59$, the results are observed consistent with those of perturbative QCD
(pQCD). The presented calculation can play a bridge role connecting those from
the lattice QCD with the heavy quark symmetry and perturbative QCD(pQCD) to
have an all-around understanding of $B{\to}D l\tilde{\nu}$ transitions.
