单项选择题 A．Canada, Japan and Mexico.B．Canada, Mexico and the European Union.C．Japan, the European Union and Asia.D．Japan, Latin America and Asia.

单项选择题 热水管道的正确安装顺序是（）。①水平横干管；②立管；③水平横支管

单项选择题 听力原文：M: Hi, Betty! Would you like something to drink? You are sweating!W: Oh, thank you! I have to work hard since I have put on a lot of weight recently.Q: Where does the conversation take place?(14)A．In the gymnasium.B．In the office.C．In the restaurant.D．In the hospital.