CÁCH LÀM: Áp dụng cấu trúc câu điều kiện loại I:
`->` If + Present simple (Thì HTĐ), Future simple (Thì TLĐ)
LỜI GIẢI CHI TIẾT:
1. is/will drive
2. send/will receive
3. will be/come
4. have/will do
5. will take/have
6. will be punished/fail
7. rains/will stay
8. will do/promises
9. will ... do/don't have
10. will look/have
11. the weather is/we will drive
12. she send, they will receive
13. Fred will be/Jack arrives
14. I will come/I have
15. she doesn't pass/she won't get
16. You will learn/you take
17. I get/I will go
18. I will buy/it doesn't cost
19. If you run/you will catch
20. I will go/I don't feel
21. If they win/they will be
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