单选题 Speaker A: ______?
Speaker B: I don't think so. The fellow who was here finished his lunch and left.
A. Can I take this seat B. Is this seat taken
C. Can I sit here D. Is this seat vacant

【正确答案】 B
【答案解析】[解析] Speaker B的回答是否定的，并且补充说坐在这里的人吃完午饭离开了，根据选项，只有B是相应的答案。