một hình chữ nhật có chu vi gấp 5 lần chiều rộng nếu giảm chiều dài đi 13 m tăng chiều rộng thêm 9m thì trở thành hình vuông tính diện tích hình chữ nhật ban đầu

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13. These students didn’t arrive late although there was the traffic jam. - Despite........................................................................................................................................ 14. Mary can’t sleep because there was the noise. - Because of.................................................................................................................................. 15. She didn’t get ill though she worked very hard. - In spite of.................................................................................................................................... 16. His wife usually gives him a list because he often forgets things. - Because of.................................................................................................................................. 17. Though he had much experience, he didn’t succeed in repairing the machine. - Despite........................................................................................................................................ 18. Though Kid has failed so often, he has never been disappointed. - Despite........................................................................................................................................ 19. Though I hadn’t eaten anything for 24 hours, I didn’t feel hungry. - In spite of.................................................................................................................................... 20. He ate all the fruits though they were green. - He ate all the fruits despite......................................................................................................... 21. He left school because his life was hard. - Because of ................................................................................................................................. 22. Although he hadn’t finished the paper, he went to sleep. - Despite........................................................................................................................................ 23. He is dismissed because of being late for work often. - Because....................................................................................................................................... 24. Because of driving too fast, he caused a serious accident. - Because....................................................................................................................................... 25. Although the streets are narrow, many people drive cars in this city. - In spite of.................................................................................................................................... 26. Because he got up early, he wasn’t late for the first train. - Because of.................................................................................................................................. 27. Although he is strong, I’m not afraid of him. - In spite of.................................................................................................................................... 28. My neighbor couldn’t return home because of losing all of his money. - Because....................................................................................................................................... 29. He carried the bed onto the roof of his house because of the hot weather. - Because....................................................................................................................................... 30. I can sleep although it is hot. - In spite of....................................................................................................................................