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Nội dung: <blockquote data-quote="keluhanhcodoc" data-source="post: 163282" data-attributes="member: 311027">Lần sau bạn nên tự làm bài trước, nếu chưa chắc chắn về bài làm của mình thì post lên để mọi người kiểm tra hộ bạn. Chứ bài tập mà bạn cứ nhờ người khác làm thế này thì bạn sẽ không nắm được bài đâu. Thân ái! Bài 1: Sử dụng thì quá khứ đơn giản hoặc quá khứ hoàn thành của động từ trong danh sách để hoàn thành câu. Bao gồm bất kì từ nào trong ngoặc đơn. Mỗi động từ chỉ được sử dụng một lần.Be        finish   Invent  Sting    Burn    Fly       Leave  Teach   design  Help    spend   Turn on 1. By the time Jason arrived to help, we (already)__had already finised_________moving everything.2. The apartment was hot when I got home, so I___turned on________ the air conditioner.3. Alexander Graham Bell (already)____had already invented______________ the telephone by the time I was born.4. The farmer’s barn caught on fire some time during the night. By the time the firefighters arrived, the building ___had burnt__________ to the ground. It was a total loss.5. The suit I bought cost more than a week’s salary. Until then, I (never)_had never spent________ so much on one outfit.6. Yesterday a hornet__stung_____________ me under my arm. That really hurt! When I put on my shirt after working in the garden, I didn’t notice that there was a hornet in it.7. We were not happy with the plans that the architect showed us for our new house. Obviously, he(never) _had never designed______________ a home like the one we wanted.8. When I saw that Mike was having trouble, I___helped__________ him. He was very appreciative.9. My wife and I went to Disneyland when we visited Los Angeles last spring. Prior to that time, we (never)_had never been_______________ to such a big amusement park. It was a lot of fun.10. Last year I experienced how tedious long plane trips can be. I___had flown__________ in an airplane for fairly long distances before, but never as long as when I went to Australia in June.11. Mr. Khan has had experience teaching chemistry and physics, but he (never)__had never taught_ mathematics until this year. He’s found that he enjoys teaching math.12. Promptly at five, I went to Iris’ office to offer her a ride home from work, but I couldn’t find her. She (already)__had already left_____________________.</blockquote>

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