4. With luck, he may pass the entrance examination.
 If ________________________________________________________________
5. You must concentrate, or you won’t understand the lesson.
 If ________________________________________________________________
 If ________________________________________________________________
6. Don’t be careless or you’ll fall over the rock.
 If ________________________________________________________________
 If ________________________________________________________________
7. Peter will pass his exam, but he has to study hard.
 If ________________________________________________________________
8. Working too much will make you tired.
 If ________________________________________________________________
 If ________________________________________________________________
9. Hard work leads us to success.
 If ________________________________________________________________
10. Be careful or you’ll break the vase.
 If ________________________________________________________________
 If ________________________________________________________________