1. вставьте глагол в нужной форме, чтобы образовать условные предложения 0-го типа. if you (to drive) along the river bank it (to be) twenty miles out of your way. if you (to take) your mobile phone into class, it (must) be turned off. we (not use) calculators when we (write) tests. if you (to push) this button, the volume (to increase if you (to close) the door, it (to lock) automatically. (to wear) my old boots when i (to work). when i (to cook) salads, i (to use) only olive oil. when i (to concentrate), please (not to make) so much noise. unless prices (to rise), (not to be) a good investment. unless (to ask) you politely, (to refuse) to do anything.