11. He gave / was given a present to her.
12. She gave / was given this present for her wedding anniversary.
13. My bike runs / is run very fast.
14. He knocked down / was knocked down by a bike yesterday.
15. Her house ruined / was ruined in the fire.
16. I don't know anything about building. I will have built my house / will have my house built.
17. Although she is a professional cook, she has all her cakes made / makes all the cakes.
18. She is a hair-dresser, so she has had her new hair-style done / has done her new hair-style.
19. I didn't go to the post office. I had all the letters sent by my secretary / had sent all the letters.
20. Our son had his bike repaired / repaired his bike. We are so proud of him.