　Thomas Adams, an American invntor,is the father of modern bubble gum.
During the 1870s, Adams discovered by accident a new way to make chewing gum,while he was trying to find a use for chicle.
Chicle is a Spanish word for the sap that comes from one kind of Mexican tree. Mr. Adams wanted to make rubber from chicle.

　Mr. Adams worked for a long time trying to make rubber from chicle. His olderst son, Thomas Jr., also helped him now and then. But they never discovered a way to make it work.

　One day, Thomas Adams Sr. was in a store when he heard a young girl ask for some chewing gum. Adams and his son had been chewing chicle while they were working on the rubber, so he decided to give up trying to make rubber from the chicle and make gum instead.

　At that time, chewing gum was made from sap from spruce trees. This chewing gum had a strong taste. Adams thought chewing gum from chicle tasted better. He and his som wrapped small pieces of chicle in colored paper and sold it. In no time, people everywhere began chewing his gum.

　People could blow bubbles with chicle chewing gum, but the bullbes were very sticky. It was not until 1928 that Walter Diemer found a way to improve chewing gum by making bubbles that were not sticky.

A．Ｃircle the letter of the word or phrase that best completes the sentence.

1. Thomas Edison, who made the first electric light, was a famous 　　　　　　.
a. publisher	b. writer	c. inventor	d. philosopher

2. Linda does not like the 　　　　　 of fruit candy.
a. chew	b. bite	c. sweet	d. taste

3. Bubble gum was invented 　　　　　．
a. without question	b. by accident	c. now and then	d. around the world

4. Some kinds of meat are very difficult to 　　　　　 .
a. earn	b. discover	c. invent	d. afforded

5. Denise never 　　　　　 looking for a niceman.
a. gave up	b. told apart	c. translated	d. afforded

6. Bicycle tires are made of 　　　　　 .
a. gum	b. bubbles	c. rubber	d. candy

　Thomas Adams was the man who (1)　　　　　　 a way to make rubber gum from chicle.

At first, he was trying to make (2)　　　　　　 from chicle. He worked for many years on

this, and his son helped him (3)　　　　　　 . Later he got the idea to make gum from chicle.

Adams (4)　　　　　　 the idea of making rubber and became rich making bubble gum.

Later, another man (5)　　　　　　 Adam's idea by making bubble gum that was less sticky.

Ｂ．Ｃomplete the passage with items from the box. One item is extra.

discovered 　　　gave up 　　　improved 　　　now and then 　　　rubber 　　　taste

１．by accident	= by chance, not planned
・He was killed when he shot himself by accident.
・Last night i found a great new web site by accident.

2．now and then	= sometimes
・Everybody has bad days now and then.
・I enjoy going to movies now and then.

3．give up	= stop doing something
・Amy gave up searching for her dog when it got dark.
・William gave up smoking several weeks ago.

sap	sugary water inside plants
Jr.	Junior (used a child who has the same name as one of his/her parents)
Sr.	Senior (used a child who has the same name as one of his/her children)
wrap	to cover, like a gift or present