Kết hợp câu dùng câu điều kiện

Giải gấp giúp mình với
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B. BÀI TẬP ÁP DỤNG
Exercise 1: Kết hợp câu dùng câu điều kiện
1. He can't go out because he has to study for his exam.
→ If
2. She is lazy so she can't pass the exam.
If
3. He smokes too much; that's why he can't get rid of his cough.
→ If
4. I can't play football this afternoon because I felt tired.
→ If
5. Olga and Ivan weren't paying attention, so they didn't see the sign marking their exit from the
highway.
6. She can't be employed because she doesn't have a college degree.
→ If . .
7. She walked to the meeting. She was late.
→ If
8. Unless you promise to return back, I won't lend you.
→ If
9. We put off our trip because the weather was terrible.
→ If . .
10. Sally doesn't know what she has to do for homework because she was absent from school on
Friday.
11. If you do not like this one, l'll bring you another.
→ Unless .
12. Martin failed his driving test last week because he was very nervous.
→ But for.
13. He will pay me tonight; I will have enough money to buy a car.
→ If
14. Leave me alone or l'll call the police.
→ If
15. If you arrive at the office earlier than I do, please turn on the air-conditioner.
→ Should.
16. He died so young; otherwise, he would be a famous musician by now.
→ Had it
17. The car breaks down so often because you don't take good care of it.
→ Were you
18. Don't tell lies to your boss or you'll be fired at once.
→ If
19. He didn't revise all his lessons, so he failed the exam.
→ Had
20. Rita is exhausted today because she didn't get any sleep last night.