44. The police have arrested five suspects .............................................................................. 45. Kerrie has paid the bill. .............................................................................. 46. I have eaten a hamburger. .............................................................................. 47. I have opened the present. ............................................................................. 48. They have not read the book. .............................................................................. 49. You have not sent the parcel. ............................................................................. 50. Has she phoned him? ............................................................................................... 51.The delegates had received the information before the recess ......................................................... 52. He had finished his home work before she came. ............................................................................. 53. They had written the passage.. ............................................................................. 54. They had planted trees. ............................................................................. 55. I know that they had told him of the meeting.