It's my pleasure(=my pleasure)相当于“好的”“不客气with pleasure 乐意帮忙.eg. Would you mind .? With pleasure.
that's all right.(=okay)
not at all一点也不 not a bit一点也没有
not a little 很多 not any more不再……
sorry to hear that.表抱歉
你的问题有点宽泛哦~~ 因为不同语境的日常口语太多了,你可以买历年的考试题,每个卷子都有一到这样的单选,总结一下,效果很好哈~~