单选题 Speaker A: Excuse me, do you need a hand?
Speaker B: ______
A. Oh, yes, please. I haven't used one like this before.
B. No, thank you. I don't need another hand.
C. Sorry, do you know how to do this exercise?
D. Of course. I need a hand.

【正确答案】 A
【答案解析】[解析] A方主动向B方提出是否需要帮忙。B方需根据实际情况接受或谢绝别人的好意。A项和B项前半部分都是恰当的回答，但B项的后半部分显示B方误解了A方的话。C项后半部分恰当，但前半部分用“Sorry”错误，D项前半部分用Of course，显得不太礼貌。