1、反义疑问句：had you?或will you?
【解析】had better 在反意疑问句中,疑问部分一般用"had+主语?",但有时可用"will you?"表示一种请求或建议.如：
You'd better not go out today,had you?
今天你最好不要外出,好吗?
I must stay at home this afternoon.You had better come to my house,will you?
今天下午我必须留在家里,你最好来我家,好吗?
2、【参考译文】
Which area does the phenomenon happen more frequently ,in China or in Europe?