Will you stay for lunch?Sorry,______.My brother is coming to see me.A.I mustn’t B.I can
问题描述：
Will you stay for lunch?Sorry,______.My brother is coming to see me.A.I mustn’t B.I can
答
i won't
答
选A
答
应填''I can't."".
原因：从下文得知,我不能留下来吃晚餐,因为哥哥要到我家看望我.can't表示不能够（客观原因造成做不到）；而mustn't表示不应该（主观认为不应该）；
答
I can`t