2014朝阳二模初三英语27题求解
27.—_________yougoswimmingwithmetomorrow?
—No,Ican’t.It’smyfather’sbirthday.
A.CanB.MayC.NeedD.Must
答案是D.为什么啊?我选的A,根据回答中的cant.怎么会是must呢?