11. The boy is my cousin. You make fun of him.
-> The boy whom you make fun of is my cousin.
12. The student is from china. He sits next to me.
-> The student who sits next to me is from china.
13. I thanked the woman. This woman had helped me.
-> I thanked the woman who had helped me.
14. The professor is excellent. I am taking his course.
-> The professor whom I am taking course is excellent.
15. Mr. Smith said he was too busy to speak to me. I had come to see him.
-> Mr. Smith whom I had come to see said was too busy to speak to me.
16. I saw a lot of people and horses. They went to market.
-> I saw a lot of people and horses who went to market.