1.If you drive along the river bank it is twenty miles away out of your way.
2.If you take your mobile phone into class,it must be turned off.
3.We don't use calculators when we write tests.
5.If you push this button,the volume increases.
6.I wear my old boots when I work.
7.When I cook salads,Imuse only olive oil.
8.When I concentrate,please don't make so much noise.
9.Unless prices rise,it isn't a good investment.
10.Unless someone asks you politely,refuse to do anything.