【简答题】You may have known several kinds of police --- traffic police, fire police and street police. But have you ever heard of energy-saving(节能) policeman? A group of 22 energy-saving policemen went to work...
【简答题】听力原文:(A) Police officers are getting into their vehicles. (B) Police officers are driving their vehicles. (C) Police officers are standing near their vehicles. (D) Police officers are backing up their...