1) (If my brother / cooks, / he / burns the food)
2) (If Julie does not wear a hat in summer, she / gets sunstroke)
3) (If you / mix water and electricity, / you / get a shock)
4) (If you / heat ice, / it / melts)
5) (she / buys expensive clothes if she / goes shopping)
6) (my sister / passes her exams if she / works hard)
7) (David is to be sick if he / eats too much candy)
8) (l / like to visit the museums if l am in a new city)
9) (my mother / cleans it really well if she / cleans the house)
10) (the river / freezes if it is very cold)