Chuyển câu cho đúng

----- Nội dung dịch tự động từ ảnh -----
1. Because the rain is so heavy, we come late.
=> If
2. He doesn't have a lot of money, so he doesn't buy his parents a house.
=> If
3. After she had had dinner, she went out with friends.
- Before
4. Volunteers sent food and blankets to homeless people.
→ Food and blankets
5. Plant more trees or the air will be seriously polluted.
=> If