could have the chance to proudly say that you saved someone's life.

4. Why did the author refuse to learn more about bone marrow donation before?

　 A. Because she could get nothing from it.

B. Because she thought that donating would be painful.

　 C. Because she had known nothing about it.

D. Because she was in poor health.

5. What can we learn from the underlined sentence in paragraph1?

　 A. The author was concerned about others.

　 B. The author was confident about the bone marrow donation.

　 C. The author needs the bone marrow donation now.

　 D. The author donates her bone marrow to save others.

6. The author needs the bone marrow because she got _________.

　 A. cancer B. headache C. flu D. high blood pressure

7. The author told us her story to _________.

　 A. show us the experience of her college life. B. explain the cause of her cancer.

　 C. recall her painful past. D. encourage people to be a bone marrow donor.

C

The trouble of having to charge（充电）your smartphone for hours a day could become a thing of the past.

British scientists have created a material that replaces the screen glass for phones, i-pad and smartwatches, but uses no power----meaning they could be charged weekly. The discovery is important because more than 90 percent of a device's battery power illuminates（照明）the screen.

Technology firms have focused on improving battery life. But the British experts say dealing with the main power-using may give better results. Oxford University engineer Dr Peiman Hosseini, who invented the material, told the Sunday Telegraph: " You have to charge smartwatches every night. But if you had smart glass, you could recharge it just once a week."

The invention uses electrical pulses to create displays that require no power and can be viewed even in direct sunlight. Dr Hosseini's company, Bodle Technologies, hopes to have a prototype（样机）in a year.