1. The scientists researching the causes of cancer are making progress.
2. John found the cat whose leg was broken.
3. Daisy has 3 brothers, all of whom are teachers.
4. Most students punished last week are lazy. 
5. Fans wanting to buy tickets started queuing early.
6. The man waiting for the bus is wearing a red coat.
7. This is the second person to be awarded this medal.
8. The ideas presented by her are very unreal.
9. The films which have a lot of sex can't be shown to children.
10. I'm going to the party which is held in the biggest restaurant in the town.
11. The house which I bought 5 years ago has been sold.

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- Sử dụng đại từ quan hệ để nối 2 câu:
Xác định từ cần thay thế ở 2 câu rồi thay thế bằng đại từ phù hợp. (người -> who; vật -> which; địa điểm -> where; thời gian -> when;.....)

- Rút gọn mệnh đề quan hệ:
Chủ động -> Rút gọn bằng V-ing.
Bị động -> Rút gọn bằng V3/ed.
Có các từ như the last, the first, the second, the only, so sánh nhất,... -> Rút gọn bằng to-V.