1、Your presentation must have gone well. You look like the cat that swallowed the canary.
你的发言反响一定不错，你看起来满面春风的。

2、It's a secret. Try not to let the cat out of the bag.
这是个秘密，别告诉别人啊！

3、We get on very well as adults but as kids we fought like cat and dog.
我们小时候经常吵吵闹闹，但是长大之后相处得很好。

4、Tell them all they've got to work on Saturday. That should set the cat among the pigeons.
告诉他们说周日得加班，这消息肯定能引起轩然大波。