用 is,was,were填空What( )your mother?( )Su Hai and Su Yang sisters?
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用 is,was,were填空
What( )your mother?
( )Su Hai and Su Yang sisters?
What is your mother?
Are Su Hai and Su Yang sisters?
用 is,was,were填空
What( )your mother?
( )Su Hai and Su Yang sisters?
What is your mother?
Are Su Hai and Su Yang sisters?