1. Why? What? How?
1. They have chemistry/ They have a chemistry class
2. An experiment
3. It´s David´s birthday on Sunday
4. They plan a surprise party for him, after school on Monday.
5. They can tell him that they have an extra band practice.
6. They can have a potluck party.
7. They mix the wrong chemicals.
8. A stink bomb.
9. That is fantastic.
10. Open the windows.


2. What´s wrong?
1. Principal
2. Work
3. Work
4. Fresh
5. Awful
6. I don´t know
7. Downstairs
8. Teachers
9. Pupils
10. History
11. We must go out
12. Right
13. Windows
14. These pupils
15. Middle
16. What´s wrong


3. In the lab
1. chemistry lab
2. downstairs
3. interesting
4. equipment
5. cupboard
6. bottles
7. test tubes
8. awful
9. smell
10. mistake
11. principal
12. stand
13. Tuesday
14. group
15. surprise
16. birthday


4. This/these or that/those
1. this
2. those
3. that
4. these
5. those
6. these
7. that
8. this



5. -es (-iz)
1. chanses
2. wishes
3. glasses
4. boxes
5. bushes
6. benches
7. lunches
8. messages