1. If she does not hurry, she'll be late.

⇒Unlessshe hurries, she will be late.

2. If we had more rain, our crops would be better
⇒Unless we had more rain, our crops wouldn't be better

3. If you don't like this one, I'll bring you another.

⇒Unless you like this one, I will bring you another.

4. If you are not careful, you'll cut yourself.

⇒Unlessyou are careful, you will cut yourself.

5. I'll not be able to do any work If I do not have a quiet room.
Unless I have a quiet room, I'll not be able to do any work.

6. The flood would have been ruined if the flood had risen higher.

⇒Unless the flood had risen higher, the crops would not have been ruined.

7. If you had not sneezed, he wouldn't have known that we were there.

⇒Unless you had sneezed, he would not have known that we were there.

8. If she did her hair differenty, she would look quite nice.

⇒Unless she did her hair differently, she would not look quite nice

9. If john had played for our football team, we would not have lost the game.

⇒ Unless John had played for our football team, we would have lost the game.

10. If I won the first prize in a lottery, I’d give up my job.

⇒ Unless I won the big prize in a lottery, I would not give up my job.

TL:

1. Unless he hurries, she will be late

2. Unless we had more rain, our crops wouldn't be better

3. Unless you like this one, I will bring you another

4. Unless you are careful, you will cut yourself

5. IUnless I have a quiet room, I'll not be able to do any work

6. Unless the flood had risen higher, the crops would not have been ruined

7. Unless you had sneezed, he would not have known that we were there

8. Unless she did her hair differently, she would not look quite nice

9. Unless John had played for our football team, we would have lost the game

10. Unless I won the big prize in a lottery, I would not give up my job