1个英语问题In the play,she （must） appear in a bright red dress an

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1个英语问题
In the play,she （must） appear in a bright red dress and long black stockings.
括号中的must能用have to替换吗?那是替换成 will have to 还是 has to
原文：
My aunt Jennifer is an actress.She must be at least thirty-five years old.In spite of this,she often appears on the stage as a young girl.Jennifer will have to take part in a new play soon.This time,she will be a girl of seventeen.In the play,she must appear in a bright red dress and long black stockings.Last year in another play,she had to wear short socks and a bright,orange-coloured dress.If anyone ever asks her how old she is,she always answers,'Darling,it must be terrible to be grown up!'

这是新概念2 的一篇课文
如要替换,用will have to

请问In the play,she must appear in a bright red dress .中的谓语动词a In the play,she must appear in a bright red dress and long b she must appear in a bright red dress.that's what she has to 英语翻译she must appear in a bright red dress and long black sto 新概念2的17课中She must appear in a bright red dress and long blac She ____ appear in a bright red dress and long black stockti she must appear in a vright red dress and long black stockin she is in a red dress.(同义句） she is in a red dress 同义句 she—— —— a red dress Is she in a red dress?Yes.She ____! the girl in a red skirt must be sally,（） she? She looks beautiful in the red dress.的同义句 The red dress ( )