1. If the festival didn't cost too much money, we would hold it.
2. While the hare was sleeping, the tortoise was running.
3. Although the girl worked hard, her stepmother wasn't happy.
4. If I were you, I would plants vegetables in my garden. 
5. THe first telephone was invented te Alexander GB. 
6. After people had evacuated, the rescue workers came. 
6. If there weren't too many vehicles here, the air wouldn't be polluted.
8. Because the acid rain, tree's leaves are damaged.  
9. If I were you, I would take more exercise.
10. Unless we get help, we can't do the job. 
11. The sounds from a vacuum cleaner can lead to permanent hearing loss.

1. If the festival costs too much money, we won't hold it.

2. The tortoise was running while the hare was sleeping.

3. Although the girl worked hard, her stepmother wasn't happy.

4. If I were you, I would plant vegetables in my garden.

5. The first telephone was invented by Alexander GB.

6. After people had evacuated, the rescue workers came.

7. If there are too many vehicles here, the air will polluted.

8. Because of dangerous acid rain, tree's leaves are damaged.

9. If you take more exercises, that will be the way to get fit.

10. Unless we get help, we can do the job.

11. The sounds from a vacuum cleaner can lead to permanent hearing loss.