wondered about the secrets of nature. Nature, he often said, is full of secrets. He tried to understand them; then, he tried to learn what could usefully be done with them.

Edison enjoyed thinking. He knew that most people will do almost anything instead of the difficult work of thinking, especially if they do not think very often. But he knew, too, that thinking can give men enjoyment（享受，令人愉快的事物）and pleasure.

Edison could not understand how anyone could be uninterested in life. As he loved to think, he also loved to work. On the day he became 75 years old, someone asked him what ideas he had about life. "Work," he answered. "Discovering the secrets of nature and using them to make men happier." He said he had enough inventions in his mind to give him another 100 years of work.

4. Edison thought____________.

A. he could be happy if he was a genius

B. genius plays the most important part in one's success

C. hard work could do better than genius

D. genius could do better than hard work

5. Edison was _____________.

A. very much interested in nature

B. interested in discovering the secrets of nature

C. interested in changing people's ideas

D. uninterested in making people happier by discovering the secrets of nature

6. In Edison's opinion,______________.

A. thinking can supply people with enjoyment and pleasure as well as help

B. people's success lies mostly in genius

C. hard work is the second important thing in making people successful

D. there are few secrets for him to discover later

7. The last sentence in the passage most probably implies __________ .

A. life is too short for Edison to invent more for human beings

B. Edison made 100 inventions in his life

C. Edison was able to live and work for 100 years

D. People of his time were ready to give Edison another 100 years' work

　C

　Teenagers who spend hours in front of the television may have a poorer diet as young adults.

　A study，which included nearly 1，400 high school students, found those who watched TV for five hours or more per day had less healthy diets than peers (同龄人）five years later. Why does this happen? Should the parents take any measures.

　On the one hand, people who spend a lot of time in front of the TV, especially

teenagers，may snack more，and that may affect their long-term diet quality.