单选题 Speaker A: This toothache is killing me.
Speaker B: If I am right, this is the third time you've had it this month.
Speaker A: You are right. ______.
A. It's all right B. It'll be gone
C. I have no method D. I'm fed up with it

【正确答案】 D
【答案解析】[解析] 说话者A说：“我的牙疼可真要命。”说话者B应答说：“是啊!如果我说得对的话，这已是你这个月第三次牙疼了。”对此，说话者A的反应应为D。