--Where _are_ your brother _goes_ (go) this coming winter holidays?
--Guangzhou.My brother usually_stays_ (stay) in my grandma's home there during the winter holidays.
首先your brother前跟are
your brother是第三人称单数后跟go的三单形式goes,
而第三个空也是考察三单的,所以在stay后加s,则stays
总的来说这道题应该是考察第三人称单数的运用.