to be dog tired 累趴下，累成狗

1.To be dog tired–to be exhausted.

累趴下，累成狗

例句：I have worked 70 hours this week. I am dog tired.

我这周工作了70个小时。我都累趴下了。

2.Let the cat out of the bag – to reveal a secret.

透露秘密

例句：Great! George in Finance knows about our new product. Who let the cat out of the bag?

太棒了。财政部的乔治知道了我们的新产品。谁说出去的？