主要内容：

1. To have ants in your pants There's a test tomorrow, and he can't concentrate or keep still. He looks like he's got ants in his pants. 2. Barking up the wrong tree. You're barking up the wrong tree if you're expecting us to lend you any money. 3. To have a bee in your bonnet （about sth）. Our teacher has a bee in his bonnet about punctuation. 4. A bird's eye view. If you look at Google Maps you can get a bird's eye view of your street. From the plane we had a bird's eye view of bj 5. To kill two birds with one stone. I went to the dentist, and asked him to fill the molar, and remove the wisdom tooth at the same time. Might as well kill two birds with one stone. 6. To be like a bull in a china shop. Don't let him touch that, he's like a bull in a china shop. 7. To be like a cat on a hot tin roof. She's waiting for her boyfriend to call, and she's been like a cat on a hot tin roof all day. 8. To let the cat out of the bag. Everybody knows about the redundancies, someone let the cat out of the bag. Who Let the Cat Out of the Bag? 9. The elephant in the room. Her blindness was the elephant in the room. 10. To have bigger fish to fry. He couldn't stay long, with this merger he has bigger fish to fry. 11. To say you could eat a horse. I haven't had any breakfast, so I could eat a horse. 12. donkey’s years We've known each other for donkey's years. I haven't been there for donkeys 13. talk the hind leg off a donkey I couldn't get a word in edgeways. That guy could talk the hind leg off a donkey. 14. Even a blind squirrel can find a nut once in a while. I was surprised when he came up with the solution, I didn't think he was that clever. I guess that even a blind squirrel can find a nut once in a while. 15. To cry wolf. Don't take any notice of him, he's always crying wolf.