水坑里饮水。

　　come up with　　　　 想出；提出

　　come across 被理解；偶遇；偶然发现

　　come on 演出；赶快；得了吧

　　come about 发生；产生

　　①Right.What I want now is two volunteers to come down to the front.

　　好了，现在我需要两个自告奋勇的人到前面来。

　　②Many people are working hard to preserve these ponies(马驹), and trying to come up with plans.

　　很多人在努力保护这些马驹，并且尝试着提出一些计划。

　　③Is this your necklace, Mary? I came across it when I was cleaning the bathroom this morning.

　　玛丽，这是你的项链吗？我今天早上打扫浴室的时候看到的。

　　④How did it come about that he knew where we were?

　　他是怎么知道我们在什么地方的呢？

　　 add...to...把......加到......里

　　(教材P54)English idioms are a way of adding colour to the language.

　　英语习语是一种为语言增色的方式。

　　(1)add to　　　　　 增加；增添

　　add up 把......加起来

　　add up to 合计达

　　(2)in addition 另外

　　in addition to 除......之外

　　①You can add meal money to your ID cards at the Front Desk.

　　你可以在前台把饭钱充到ID卡上。

　　②Perhaps you think you could easily add to your happiness with more money.

　　或许你认为能很容易用更多的钱来增加幸福感。

　　③In addition，I will go on a trip to Sichuan, where there are a great number of places of interest.

另外，我要去四川旅游，那里有很多名胜。