Ⅲ. 根据课本第48页2c的内容,填入适当的单词完成下列表格。
★ How Spencer Silver turned his idea into reality.
• Be open to accidents or unexpected results
In 1968, Spencer Silver tried to make a strong 1., but made a weak one that could be removed easily.
• Solve the problem
In 1974, Arthur Fry wanted to mark song book pages, but his small paper pieces always 2. when he stood up to ing.
Fry used Silver's weak glue on the paper. The paper could stay on the pages and be 3. later.
• Improve the invention
Sticky notes of many sizes and colours were produced. They became popular and are now 4. all over the world.

1. glue 2. fell (to the floor) 3. removed 4. widely used

Ⅳ. 从课本第49页3a文本中,按要求找出相关的关键词。
★ How the Wright brothers turned their idea into reality.
• State the invention's impact
1. The invention of the plane .
• Give a surprising fact about the inventors
2. However, the inventors change the world at all. Rather, they just wanted to fly like birds.
• State the main problem
3. To solve the problem of heavier-than-air flight, the Wright brothers began .
• Describe the challenges
4. There were two main challenges. The first was . The second was once it was flying.
• Explain how they solved the challenges
5. For both problems, they found their solution by .
• State the result (when and what)
6. Then, in December 1903, plane flights were made.
• State the effect
7. The invention made travel around the world much .
8. It communication and made the world smaller.

1. has greatly changed the world 2. were not looking to
3. working with glides 4. how to make gliders into the air, how to control it
5. looking at the birds flying 6. the world's first 7. easier and faster 8. improved