题目

You realize that you were driving at 80 miles per hour, don’t you ?--No, officer, I ______ . This car can’t do more than 70.       A. don’t need to be                             B. must not have been       C. couldn’t have been                        D. needn’t have been 答案：C亚洲与欧洲的界河是（　　）A．苏伊士运河B．乌拉尔河C．京杭运河D．巴拿马运河