____ his mother,the baby couldn't help laughing
问题描述:
____ his mother,the baby couldn't help laughing
A.Seeing B.To see
A,why?
答
A
Seeing his mother,the baby couldn't help laughing.
seeing 是现在分词做伴随状语,表主动.
baby是看到妈妈就笑了,看这个动词是主动的.