4.
→ If....
5.
Lan didn't call me be
6.
→ If .....
He didn't study his lessons very carefully, so he gets bad marks now.
You're unhealthy because you don't take exercise.
7.
→If.....
Leon often causes accidents because he drives carelessly.
→ If.....
8. I can't apply for that job because I don't know English.
→ If.........
..
che eats too much chocolate.