A. Because of a flood 10,000 years ago. B. Because of an earthquake 10,000 years ago. C. Because of a flood 100,000 years ago. D. Because of an earthquake 100,000 years ago.
参考答案:A 答案解析:[听力原文]4-7 W: Tom, do you know why Britain is separated from the continent M: No. But I guess