be going to 计划表达 — 英语选择题

今天是周六。Lily写了一周计划：明天上午游泳，下周三和妈妈去看电影。同学问她：What are you going to do next Wednesday? 她应该回答：A. I is going to see a film with my mum. B. I'm going to see a film with my mum. C. I'm going to swim tomorrow morning. D. She is going to see a film with her mum.