0,25х * 0,4у если , x=1,2 у = 0,3

Нужно ли здесь тире:

Он подумал,  насколько чиста была его одежда и грязна - улыбка.

Find the mistakes and correct them.

1. I doesn't like my name.

2. You is a pupil.

3. You are an engineer?

4. You like cats ?

5. Are your sister a doctor ?

6. What does you want to drink ?

7. How your mother is ?

8. My balls is not in the box.

9. My mother like to with me.

10. The birds are in the tree?

11. She not like fish.

12. Where does you go to swim ?

What will you do if you want to keep fit? What will you do if you want to take part in gymnastic competition in your school? What kind of sport do you like the best and why? What will you say to coach if you are late for your training time?