If drive) along the river bank be) twenty miles out of your way. if take ) your mobile phone into class,) be turned off. we use) calculators when we )test. if push) this button,the volume increase). if you close) the door,it lock)automatically. wear) my old boots when i work) .when i cook)salads , i use) only olive oil. when i concentrate), please to make) so much noise. unless prices rise), to be) a good investment. unless someone ask) you refuse) to do anything.

If you_drive) along the river bank it_is twenty miles out of your way. If you_take ) your mobile phone into class,it(must) be turned off. We __do_(not use) calculators when we _are__(writing) a test. If you_ push) this button, the volume _will increase). If you  close) the door, it will be locked) automatically. I_ wear) my old boots when I  work) . when I _ cook )salads , I _ use) only olive oil. When I  concentrate), please __do_(not  make) so much noise. Unless prices  rise),it__wil _(not be) a good investment. Unless someone asks) you politely,_ refuse) to do anything.