第13题: [单项选择]Jack: ______Lora: I'm an engineer.Jack: Oh, are youLora: How about youJack: I work for a trading company. A. How are you doing B. What do you do C. How do you do D. What are you doing 参考答案:B 答案解析:[注释] 从Lora的回答及后面的对话内容看,显然Jack在问Lora是做什么的,可以用 What do you do或What's your job来表达。A.How are you doing和C