Rewrite, using “if”: 1. Unless we use more and more public vehicles, we will run out of oil soon.  if________________________ 2. Pollution will not increase unless we use more oil and coal. if __________________________________ 3. The climate will not change unless more and more trees die.  if__________________________________________ 4. Unless the climate change, we won’t meet with natural disasters.  _if__________________________ 5. Unless we try to control pollution, it won’t be very expensive.→if_______________________________ 6. I will not tell him this news unless I see him.  if____________________________________________ 7. Unless you hurry, you will be late for school  if_________________________________________________ 8. We will not be tired unless we walk to the market.  if_________________________________________________ Giúp em vs ạ