My sister is going to be 13 next year.请问这个句子正确吗?

My sister is going to be 13 next year.请问这个句子正确吗? Next year my little sister is to be ten years.中的is to be It is going to be a year of horse next year.It will be a yea My uncle is going to______Dalian next year? It ________ the year of the horse next year.A.is going to be It____the Year of the Snake next year.A.is going to be B.wil It ___the year of the horse next year.A.is going to be B.wil It ________ the year of the ox next year.用is going to be 还是w My uncle is going to（）Hang Zhou next year.A、moves B、move to My advice proved to be wrong.这个句子正确吗? My young brother ___be 15years old next year A is going to B My.sister.is.going.to.buy.a