Many people prefer the telephone in all circumstances and its speed is essential in many situations but (9) ......................have you put the telephone down, dissatisfied with what you h
Many people prefer the telephone in all circumstances and its speed is essential in many situations but (9) ......................have you put the telephone down, dissatisfied with what you have managed to say?
A. how often
B. how long
C. how much
D. how about