Giúp em mấy câu này với, gấp ạ. Cảm ơn mọi người! 50. When we were young, we usually (play) _______________________ football after school. 51. How long you (study) ______________________________ English? 52. Come in! I (wait) __________________________ for you. 53. You (listen) _____________________________ to what our teacher said this morning? 54. The swimming-pool (open) _______________________ at 9.00 a.m every day. 55. John (not see) _________________________ Mary since he left his home town. 56. When you (phone) _____________________ me yesterday, I (clean) ___________________ the floor. 57. Keep silent! I think someone (cry) ___________________________. 58. John (not see) _________________________ his mother since last month. 59. I don’t understand this sentence. What this word ______________________________ (mean)? 60. Jerry ________________________ (usually/ play) tennis once or twice a week. 61. It was noisy next door. Our neighbors ________________________ (have) a party. 62. It ________________________ (get) dark. Shall I turn on the light? 63. I ________________________ (look) for Christine. Do you know where she is? 64. At 5 o‟clock yesterday evening, I ________________________ (iron) my clothes. 65. “Are you ready, Ann?” “Yes, I ________________________ (come)” 66. Why you ________________________ (look) at me like that? What‟s the matter? 67. I _____________________ (walk) along the street when I suddenly heard footsteps behind me. 68. She ________________________ (learn) German for two years. 69. I usually ________________________ (go) away at weekends. 70. The earth ___________ (go) round the sun.