2. If there weren't so many billboards in our city, people could enjoy the view.
3. If there were so much light in the city at night, we couldn't see the stars clearly.
4. If we didn’t turn on the heater all the time, we wouldn’t have to pay three million dongs for electricity a month.
5. If the karaoke bar doesn’t make so much noise almost every night, the residents wouldn’t complain to its owner.
6. If she didn’t work in a noisy office, . She wouldn’t have a headache after work every day.