The house is dirty.It is ________ dirt.
A．cover with B．covered with
C．cover D．covered
The house is dirty.It is ________ dirt.
A．cover with B．covered with
C．cover D．covered
B cover...with...意为“用……把……覆盖” 根据句意“房子很脏。它被许多灰尘覆盖。”可知要用被动语态，故选B。