1. If you __________ (to drive) along the river bank it _______ (to be) twenty miles out of your way.
2. If you _____ (to take) your mobile phone into class, it __________ (must) be turned off.
3. If you __________ (to close) the door, it _________ (to lock) automatically.
4. When I ___________ (to cook) salads, I _________ (to use) only olive oil.

1. If you drive along the river bank it will be twenty miles out of your way. 2. If you take your mobile phone into class, it must be turned off. 3. If you close the door, it will lock automatically. 4. When I cook salads, I use only olive oil.