apt-get grade have problem, please help

[eric <fsshl@centurytel.net>]

Dear Debian users:

    When I apt-get upgrade, I meet the following error:

Selecting previously deselected package bind9-host.
Unpacking bind9-host (from .../bind9-host_1%3a9.2.0-4_i386.deb) ...
dpkg: error processing
/var/cache/apt/archives/bind9-host_1%3a9.2.0-4_i386.deb (--unpack):
 trying to overwrite `/usr/bin/host', which is also in package dnsutils
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/bind9-host_1%3a9.2.0-4_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

since it did not hint how to fix it, and there are many package did not
install before this error occur, so please help

thanks in advance, eric