1 . Blind people have long desired for brightness, but scientists don’t have the technology. To bring that one step closer to reality, Zhiyong Fan, a materials scientist of the Hong Kong University of Science and Technology, developed a new artificial eye recently. The device, which is about as sensitive to light and has sharper vision and a faster reaction time than a real eyeball, may outperform human eyes.

The human eye owes its wide field of view and clear eyesight to the retina (视网膜) — an area at the back of the eyeball covered in light-detecting cells. The design for a new artificial eye is based on the structure of the human eye and uses a friendly light-sensitive material. At the back of the eyeball, an artificial retina is lined with Nan scale light sensors (纳米级光感器). Those sensors measure light that passes through the lens (晶状体) at the front of the eye. Wires attached to the back of the retina send signals from those sensors to the processor, similar to the way nerve networks connect the eyeball to the brain.

“In the future, we can use this to replace damaged human eyes,” says the lead designer. In theory, this artificial eye could see more clearly than the human eye, because the artificial retina contains about 460 million light sensors per square centimeter while a real retina has about 10 million light-detecting cells per square centimeter. Besides, the artificial eyeball records changes in lighting faster than human eyes can — within about 30 to 40 milliseconds, rather than 40 to 150 milliseconds. Although its 100-degree field of view isn’t as broad as the150 degrees a human eye can take in, the device can see as well as the human eye in poor light.

Hongrui Jiang, an electrical engineer at the University of Wisconsin, though, thinks engineers need a much more practical and efficient way to produce vast series of tiny wires on the back of the artificial eyeball to give it superhuman sight, which is super hard to achieve.

1. Why does Zhiyong Fan develop the artificial eye?

A．To replace people’s real eyeballs.	B．To gain a sharper vision.
C．To help the blind regain their eyesight.	D．To help normal eyes perform better.

2. What is paragraph 2 mainly about?

A．The design of the artificial eye.	B．The structure of the human eye.
C．The advantages of the artificial eye.	D．The material used for the artificial eye.

3. What can we learn about the artificial eye and the human eye?

A．They have the same structure.

B．The artificial eye may see more clearly.

C．The human eye sees better in weak light.

D．The artificial eye takes in a broader view.

4. Which word best describes Hongrui Jiang’s attitude to the artificial eye?

A．Doubtful.

B．Favorable.

C．Unconcerned.

D．Satisfied.

2 . 假设你是李华，近日你的英国朋友Tim邀请你参加他们学校组织的暑假夏令营。你想参加，现在就此事写一封信向他咨询该活动的相关事宜，要点包括：
1. 感谢他的邀请；
2. 询问夏令营的相关事宜(具体日程安排，需要携带的物品，参营费用等)；
3. 希望尽快得到回信。
注意：
1.词数为80左右；
2.可以适当增加细节，以使内容充实、行文连贯。
Dear Tim,
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Yours,

Li Hua

3 . A lot of people attach great importance to_________ (become) rich and famous. (所给词的适当形式填空)

4 . She didn’t like the plan, but ________(就个人而言) I see nothing wrong with it. (根据汉语提示单词拼写)

5 . He opened the drawer and found that it ________(包含) a lot of money. (根据汉语提示单词拼写)

6 . It was a long time _________ he knew the full result. (用适当的词填空)

7 . Hearing the news, he breathed _________ relief. (用适当的词填空)

8 . What one looks like is not as important as what one has inside, so please don’t worry about your ________ (外貌) so much. (根据汉语提示单词拼写)

9 . There is no doubt _________ they will go to America for their holidays this week. (用适当的词填空)

10 . The toys are ________ (有吸引力的) to children due to the beautiful colors. (根据汉语提示单词拼写)