第4题: [单项选择]It can be inferred that the "safety valve" in line 13 refers to A. (a new kind of machinery B. ( an alternative for urban workers C. ( an area in a factory D. ( a procedure designed to protect workers 参考答案:D
第9题: [单项选择]Where does this conversation most probably take place A. In a hospital. B. In the army. C. In a restaurant. D. In the classroom. 参考答案:C 答案解析:W: We’’d like to order now.
M: Yes What would you like to begin with