Mum isn't in .She's _to hangzhou business

Mum isn't in .She's _to hangzhou business Mum isn't in .She has _to Hangzhou on business it snows___ ___ ___in Hangzhou in winter,doesn't it/Mum isn' she isn't in she`s sutdied economics and business administration in the t My friend isn't in her office.She's __________. She isn't in right My uncle isn't here/ She______Shanghai on business.She Sandy’s CD isn't in her bag,so she has to s------ her room Gina isn' t my sister. She's My friends isn't in her office. She's . A.on a holiday B.on Hello!May I speak to jane ,please.Sorry ,she isn't in,Who's