___is that girl?__is my sister.
问题描述:
___is that girl?__is my sister.
答
(who)is that girl?(she)is my sister.
答
who it
答
who,she
答
(Who) is that girl? (She) is my sister.
答
who
She
答
Who is that girl?
She is my sister.
答
Who is that girl? She is my sister.