内容介绍：国家开放大学《管理英语 4》机考（第二套）参考答案客观题 交际用语(共 5 题，共 10 分） 1.—Don't keep water running when you wash hands.— A.I hope so. B.I'm afraid not. C.Sorry,I won't.2.—What's the noise?It sounds as if it comes from upsta