Make use of the article to answer the questions.

"I can't see clearly, because I don't wear my glasses today." We always hear people saying something like this. Glasses are very important to many people. Do you know how they were invented and developed? Glasses took a long time to develop into what you can find in the glasses store today. The Chinese first used colored glasses as fashion. They thought that those glasses had magic, but they didn't think that glasses could help eyes to see clearly. In 1262, the inventor, Roger Bacon, discovered the amazing function of lenses , and he thought that glasses could be used to help people to see. Twenty years later, in Florence, Italy, the inventor, Alessandro di Spina, made the first pair of glasses that could help people to see. Although these glasses worked, scientists didn't understand how glasses helped eyes to see. They thought that eyes sent out light onto whatever a person was looking at, and then the light came back to the eyes. Johannes Kepler finally found out how glasses worked. Inventors continued to improve glasses. In 1784, Ben Franklin created glasses that had bifocal lenses. Many years later, in 1827, George Airy made circle-shaped glasses to correct _ , an eye problem that stops the eyes from seeing things clearly.

1. What do people need to see clear?
2. are they important?
3. Who created them?
4. When?
5. what was their purpose?
6. did they work?
7. how?
8. did they ever find out how?
9. who found this?
10. did they always stay the same?
11. what changed?
12. how?
13. who made those?
14. were there other changes?
15. by who?
16. what did he change?
17. what was their purpose?
18. Who used glasses first?
19. for what?
20. what did they think of them?

Numbered answers:
1. glasses
2. yes
3. Alessandro di Spina
4. In 1282
5. help people to see
6. yes
7. scientists didn't understand how
8. yes
9. Johannes Kepler
10. no
11. they continued to improve
12. bifocal lenses
13. Ben Franklin
14. yes
15. George Airy
16. made circle-shaped glasses
17. to correct an eye problem
18. The Chinese
19. fashion
20. they had magic