1. Unless you study harder, you 'll get bad marks.
2. Unless this man is a driver, he can help you move by car.
3. Unless he practice writing every day, he can't improve his writing skill.
4. If you don't return this book to the library today, you’ll have to pay a fine.
5. If you don't go out more often, you might fall ill.
6. Unless you are absent from school, you will not write a sick-note.
7. If the seas is not warmer, the ice at the North and South pole will melt.
#NOCOPY