补全对话,每空一词 ( )know.where 's my backpack? ( ) under the table? no,it( )

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补全对话,每空一词 ( )know.where 's my backpack? ( ) under the table? no,it( )
补全对话,每空一词 ( )know.where 's my backpack? ( ) under the table? no,it( )

补全对话,每空一词 ( )know.where 's my backpack? ( ) under the table? no,it( )
you?it's isn't

u isnt it isnt

do you
is it
isn't