Question

While dancing happily at home, ______.

A.the door bell rang

B.the door bell rings

C.we heard the door bell rings

D.we heard the door bell ring

Answer 1

D

解析:

考查非谓语动词。分词作状语时，其逻辑主语必须是句子的主语，能跳舞的应该是人，所以A、B项都不对，hear+宾语+do/doing，所以C也不对。