11. He gave / was given a present to her. 12. She gave / was given this present for her wedding anniversary. 13. My bike

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