could you mind 与would you mind 有什么区别

问题描述:

could you mind 与would you mind 有什么区别
_____you mind fetching a book for me
_____ .
A would ; certainly not
B could ; you had better not
请问第一空可以填could

可以,B答案是因为后面you had better not 使用错误,是你最好不要,口气比较强硬,用来回答我可以怎么怎么样吗的提问could you mind 与would you mind 没什么区别.