按要求完成句子。
1．Is this your brother? （改为陈述句）
____________ ____________ my ____________.
2．This is my father. That is my mother.（合并为一句话）
____________ is my ____________ ____________ that is my ____________.
3．There are three people in my family.（对画线部分提问）
How many ____________ are there in your ____________?
4．The girl has a sister.（改为否定句）
The girl ____________ ____________ a ____________.
5．The boy has a grandpa.（改为一般疑问句）
____________ the boy ____________ a ____________?
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