－i believe we've met somethere before.-no,_C_
A.it isn't the same B.it can't be true C.i don't think so D.i'd rather not
意思上B也没有问题
但是我个人认为C比较委婉 可能从场景考虑的吧毕竟只是我不这样认为怎么谈的上不可能这么绝对哪