1) Water (boil ) if you (heat) it to 100 ºc .

2) If you (mix) red and white you (get) orange .

3) Butter (melt) if you ( leave) it in the sun.

4) If you (have got) a headache , (take) an aspirin.

5) If you (add) sugar , it (taste) sweet.

6) A dog (bite) if you (go) near its food when it's eating.

7) If you (pull) a cat's tail, it (scratch) you

8) You (have) more chance of being killed if you (not wear) a seat belt.

9) You can () brain damaged if you (not wear) a crash helmet .

10) If you (press) this switch, the dvd player (come) on.