【简答题】Roman soldiers in some places built long rows of signal towers. When they had a message to send, the soldiers shouted it from tower to tower. If there were enough towers and enough soldiers with loud ...
【单选题】听力原文:W: I sent my son to a private boarding school, and they charged me a large sum of money. Do you know how much it costs a year? $15,000! M: But I think the tuition is worth every penny of it. How ...
【简答题】A few people were having dinner in a restaurant. While they were eating fish, they began to tell stories about finding valuable stones inside fish. An old man said at last. “ Now I'm going to tell you...