Hai canô cùng khởi hành một lúc và chạy từ A đến B.Canô 1 chạy với vận tốc 20km/h ,canô 2 chạy với vận tốc 24km/h Trên đường đi canô 2 dừng lại 40 phút ,sau đó tiếp tục chạy với vận tốc như cũ và đến B cùng lúc với canô 1. Tính chiều dài quãng sông AB (cho biết vận tốc không đáng kể)

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III. Combine each pair of sentences to make one sentence, using the words given in brackets. 1. At the Autumn Festival children carry beautiful lanterns. It’s a memorable childhood experience. (so) ………………………………………………………………………………………….….. 2. During Tet, Vietnamese people buy all kinds of sweets. They make Chung Cakes as well. (and) …………………………………………………………………………………………… 3. The Hung King Temple Festival was a local festival. It has become a public holiday in Viet Nam since 2007. (however) ……………………………………………………………………………………… 4. Lang Lieu couldn’t buy any special food. He was very poor. (because) …………………………………………………………………………………………..….. 5. Peter and Phong are happy to join the procession. It is going to rain. (however/nevertheless) ………………........................................................................................................................ 6. Nick wanted to travel around Viet Nam to take pictures of festivals. He started to save money. (therefore) ………………….................................................................................................................... 7. You can go to the Giong Festival. You can go to the Huong Pagoda Festival. (otherwise) ................................................................................................................................................ 8. At the Ooc om bok we float beautiful paper lanterns on the river. We also hold thrilling dragon boat races. (moreover) ................................................................................................................................................ 9. We missed the bus. We were so late. (because) ................................................................................................................................................ 10. The bus arrived. We were talking. (when) ................................................................................................................................................