问题
选择题
While watching television, .
A．the doorbell rang
B．we heard the doorbell ring
C．there was someone knocking at the door
D．we heard the doorbell rung
答案
答案：B
本题考查非谓语动词的用法,现在分词作状语,逻辑主语是句子的主语,因此watch的逻辑主语应该是we,其余两个不能发出watch这个动作。B、D选项中的宾语the doorbell与补足语之间没有被动含义，故选B。
