---Do you mind me sitting beside you? . The seat is for my son.A. Better notB. Certain

问题补充：

---Do you mind me sitting beside you?

--- . The seat is for my son.

A. Better not

B. Certainly not

C. Yes, you can

D. Yes, please

答案：

(答案→)A. Better not

B. Certainly not

C. Yes, you can

D. Yes, please

解析：：考查情景交际。句意：---你介意我坐在你旁边吗？---最好不要。这个座位是留给我儿子的。故选A。