Question

While watching television, ________.

1. A.
   the doorbell rang
2. B.
   we heard the doorbell ring
3. C.
   there was someone knocking at the door
4. D.
   we heard the doorbell rung

Answer 1

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。