Упражнение 1. Zero Conditional. Вставьте глагол в нужной форме, чтобы образовать условные предложения 0-го типа.

1. If you drive along the river bank it is twenty miles out of your way. 2. If you take your mobile phone into class, it must be turned off. 3. We do not use calculators when we write tests. 4. If you push this button, the volume increases. 5. If you close the door, it locks automatically.