giúp tớ vs ạ PÀRT 2,Far questions 13-24, read the text below and think of the word which best fits each space. Use only one s,sach space. There is an example at the beginning (0).,BAALL00NN0000@,Nowadays the (O) _____ most _____ comoon balloon flights,are usually for pleasure or sport, but did you know that ballooning begar,(13) _____ a science in the 18th century?,It all started in 1783, (14) _____the Montgolfier,brothers were looking (15) _____thh properties oo,smoke. What (16) _____ their attention was the fao,that smoke could make things rise. They experimented for a year or,so (17) _____ they were ready to show their,invention to everyone. On their first attempt, they filled a sllk bag,(18) _____ hot air from a fire. The balloon rose more,than 1.5 km into the (19) _____. Five months later,in November 1783, history was made once more when the first flight,carrying passengers left the ground. The volunteers took off from Pare,and remained in the air for over twenty minutes,Soon afterwards, scientists all over Europe became interested,(20) _____ the potential of ballooning, and,it wasn't long before the activity became very popular.,(21) _____of enthusiastic fans also experimented,with ballooning and contributed to its development. In the 19th centun,gas balloons were used for many (22) _____,Purposes, the most important one being polar exploration,in the twentieth century, hot-air baliooning was re-introduced,due to a much improved propane burner. This has,(23) _____ responsible for a whole new,generation becoming interested in ballooning either for scientific,(24) _____ sporting reasone

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{"userId":5224513,"userName":"Nguyễn Thư Quỳnh"}

Nowadays the most common balloon flights are usually for pleasure or sport, but did you know that ballooning began (13) as a science in the 18th century? It all started in 1783 (14) when the Montgolfier brothers were looking (15) at smoke. What (16) caught their attention was the fact that smoke could make things rise. They experimented for a year or so (17) until they were ready to show their invention to everyone. On their first attempt, they filled a silk bag with hot air from a fire. The balloon rose more than 1.5 km into the (19) air. Five months later (18), in November 1783, history was made once more when the first flight carrying passengers left the ground. The volunteers took off from Paris and remained in the air for over twenty minutes. Soon afterwards, scientists all over Europe became interested (20) in it, and it wasn't long before the activity became very popular. (21) Recognizing the potential of ballooning, a number of enthusiastic fans also experimented with ballooning and contributed to its development. In the 19th century, gas balloons were used for many (22) purposes, the most important one being polar exploration. In the twentieth century, hot-air ballooning was re-introduced, due to a much improved propane burner. This has (23) been responsible for a whole new generation becoming interested in ballooning either for scientific (24) or sporting reasons.