Lily这个英文名字很好听，我想这位叫Lily的小姑娘也和她的名字一样漂亮吧。Lily来信询问如何用英语表达“某某事情发生了”，“想出了某个主意，思想”等等，我们可以用“come up”或“come up with something”来表达：
I’m sorry something urgent came up, and I’ve got to leave now.
实在对不起，发生了点紧急事情，我得赶快走了。
Something unexpected came up, I lost my job.
发生了一些不可预料的事，我丢了工作。
We finally come up with a fantastic idea that would beat our competitors.
我们终于想出一个奇妙的点子来击败我们的竞争对手。
She comes up with some solutions. 　她想出了一些解决方案。
  
现在，我们来介绍一个很好的词：“sneak”是个动词，表示偷偷摸摸地做某事：
He sneaked away in the middle of the meeting.
他在会议中间悄悄离开了。
He was caught sneaking an apple from a shop.
他在商店里偷苹果时被抓住了。
She tells us she quits smoking, but I know she still sneaks occasionally.　
她告诉我们她戒烟了，但我知道她还在偶尔偷偷抽上一两根。
I sometimes sneak into the class, and observe the teacher.　
我有时会偷偷进入教室去听课。

sneaky是个形容词，表示“偷偷摸摸的”：
I have a sneaky respect towards my English teacher.
我私下里对我的英语老师怀有敬意。