未知题型 听力原文：M: Did the teacher mention today's homework?W: Yes, he said we'd better finish Exercise Two.Q: Who are the two speakers?(20)A.They are players.B.They are teachers.C.They are students.

未知题型 听力原文：M: Could you show me the blue dress?W: OK.Q: What is the man doing?(21)A.Looking at a dress.B.Buying a T-shirt.C.Drawing something bluE.

多项选择题 关于商业票据的说法，正确的有（　　）.