用have或there be的适当形式填空 ( )they( )a son?( )Lucy( )a sister?一( )they( )a son?二( )Lucy( )a sister?

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用have或there be的适当形式填空 ( )they( )a son?( )Lucy( )a sister?一( )they( )a son?二( )Lucy( )a sister?
用have或there be的适当形式填空 ( )they( )a son?( )Lucy( )a sister?
一( )they( )a son?
二( )Lucy( )a sister?

用have或there be的适当形式填空 ( )they( )a son?( )Lucy( )a sister?一( )they( )a son?二( )Lucy( )a sister?
Do have
Does has

Do have
Does has

Do they have a son ?
Does Lucy have a sister ?