Bài 2. Điền cụm từ với “for”, “since” hoặc “ago”. 46. The police have been looking for him for two weeks……….. he escaped from the prison. 47. He hasn't spoken to me even a word …………..the last meeting. 48. I haven't phoned him ……………a week. 49. He has been the principal of our high school ……………1988. 49. Dean has been learning Japanese ………..two years. 50. I have been waiting ………….4 o'clock. 51. Sue has only been waiting ……………..20 minutes. 52. Tim and Tina have been learning English …………six years. 53. Fred and Frida have been learning French …………………1998. 54. Joe and Josephine have been going out together ……….Valentine's Day. 55. I haven't been on holiday ………………….last July. 56. Mary has been saving her money ………….many years. 57. I haven't eaten anything …………….breakfast. 58. You have been watching TV …………hours. 59. We have been living here ……………2 months. 60. What have you been doing _____ we last spoke? 61. What has changed in your life _____ you moved here? 62. I have been working full.time _____ several weeks now. 63. Donald hasn't wanted to talk to me _____ our argument. 64. Tony Swanson has been with the company _____ 25 years. 65. The little girl was hungry because she hadn’t eaten anything _____ a while. 66. Puerto Ricans have been migrating to the United States _____ over a century. 67. Human beings have sought to know the unimaginable _____ the beginning of time. 68. It is believed that everything in the universe has existed _____ the Big Bang 15 billion years ago.