A.Ⅰ、Ⅱ、Ⅲ、ⅣB.Ⅰ、Ⅱ、ⅣC.Ⅱ、Ⅲ、ⅣD.Ⅲ、Ⅳ
A.He will have a meeting.B.It's not his office hour.C.He doesn't have time.D.He is too tired.
A.Ⅰ、ⅡB.Ⅱ、Ⅲ、ⅣC.Ⅲ、ⅣD.Ⅰ、Ⅱ、Ⅲ、Ⅳ