English class's unit 1

3. An event constituting a new stage in a changing situation.
6. When you mix
7. Everything in earth
9. It's not theory, come on! We need to find a.... solution to fix our problem.
10. The action or process of paying someone or something or of being paid.
11. He tried to... the size of her house.
12. Paper with your answers.
13. The qualities of an object that affect how easily it is able to move through the air.
17. Polar bears are probably gonna.... soon.
20. The scientists used a lot of.... to prove their investigation was wrong.

1. Something birds use to eat.
2. ..., the kids don't go play outside anymore.
4. The action or process of dicovering or being doscoverd.
5. An act of presenting a play, concert, or another form of entertainment.
8. They used us like... for the new medication.
14. For the university we need to do a ... about maternity.
15. I'm thinking about starting to.... my own clothes.
16. Birds use them to fly.
18. You can't... depression just smiling. You will find the real solution with medication and therapy.
19. I think I would... if that theory is right or not.