:According to the instructors in this unit, what is the proper length for making an impromptu speech?A:3 minutesB:4 minutesC:2 minutesD:5 minutes答案: 3 minutes
:According to the instructors in this unit, what is the proper length for making an impromptu speech?A:3 minutesB:4 minutesC:2 minutesD:5 minutes答案: 3 minutes