单选题 —I feel as if my head's going to explode! —______ —After I'd been playing computer games for about seven hours. —Oh well, you've only got yourself to blame, haven't you? —I know, I know. But I've taken aspirin, and it hasn't worked.

A、 Why are you walking like that?
B、 Well, when did it start?
C、 So, what did you do?
D、 Have you got any plans?

【正确答案】 B

【答案解析】根据第一个说话者的回答“我连续玩了几个小时的电脑游戏之后”，可知第二个说话者询问的是对方从什么时候开始感觉到头痛欲裂的，因此B项符合语境。