1. Read the article above. Match pictures A-D with paragraphs 1-4. 

=> Answer:

A. 3                    B. 2                  C. 1                     D. 4

2. Complete the labels in picture A.

=> Answer:

1. valve                       2. envelope                          3. burner

4. propane gas                              5. wicker basket

3. Read the article again. Answer the questions.

1. Who were the first passengers in a hot-air balloon?

2. When did the first hot-air balloon carry people?

3. Why do hot-air balloons have wicker baskets?

4. How do hot-air balloons go down? 

=> Answer:

1. a sheep, a duck, and a chicken

2. 21 November 1783

3. to carry passengers/because wicker is strong and light

4. The pilot opens the valve at the top or the balloon. Some hot air leaves the balloon and it goes dawn. 

4. Would you like to travel in a hot-air balloon? Why? / Why not? 

=> Answer:

Yes, I 'd like to try. Because I love flying and, while I'm not exactly an adrenaline junky, I do like the odd adventure sport.

5. Use the Internet to research a famous airship (an aircraft that used hot gas). Make notes about: 

• its name and when it flew.

• how it moved.

• if it was safe.

• any other interesting information. 

=> Answer:

The Hindenburg — officially designated LZ-129 Hindenburg — was the biggest commercial airship ever built, and at the time, the most technologically advanced. It was 245 meters (803.8 feet) in length and 41.2 m (135.1 feet) in diameter, according to Airships.net. The Hindenburg took its first flight in 1936. That year, the vessel went on 10 round trips between Germany and the United States and carried a total of 1,002 passengers during the journeys, according to History.com. The vessel could carry up to 50 passengers and had room for the airship's crew.

6. Write a paragraph about the airship. Add some pictures. Show your project to the class. 

=> Answer: HS tự làm.