№4. Write the idioms that fit to these sentences.

Краткое пояснение:

1. After school, my friend just sits on the sofa and plays video games. He's such a couch potato.
2. I lost my favourite pen, but my mum said, “Don't worry, you can buy another one.”
3. Everyone was worried before the concert, but Tom was cool as a cucumber. He wasn't nervous at all!
4. We tried to build a treehouse together, but we couldn't agree on how to do it.