题目内容

(   ) 3. Low-income residents can't afford to        a doctor or purchase medicines when

they get sick,which made things worse.

A. claim    B. consult C. occupy    D. capture

3. B考查动词的词义辨析。claim宣称，申明；consult咨询;occupy占领，占用(时间).使忙碌；capture捕获。句意：低收入的居民生病时没钱看医生或买药，这让事情变得更糟糕。

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(   ) 9. With not much time left,I stopped off        in London to visit my grandpa on my

way to Geneva.

A. shortly    B. briefly C. eventually    D. frequently

27. A Frenchman who lost his arms and legs successfully swam across the Channel，a challenge he        for two years. (prepare)

一位失去了双臂和双腿的法国人成功地游过了这个海峡，完成了一个他准备了两年的挑战。

4. It was not until the clock struck 12 on TV        firecrackers to celebrate the New Year's coming. (set)

直到电视上敲12点钟，他才燃放鞭炮来庆祝新年的到来。

Most people know Alexander Graham Bell invented the telephone. But not many know about another talking device (equipment) he invented just four years later，in 1880. He called the device the photophone.

"Photophone" comes form the Greek words for "light" and "sound". The photophone did not use electricity to carry sound over wires between two people. That' s what a telephone does. Instead,

the photophone used a beam of sunlight traveling through the air. With his invention, Bell could actually transmit(传递)human speech on a beam of light. To do so，he spoke close to a thin mirror that was reflecting sunlight. The vibrations(颤动)of his voice caused the mirror to vibrate，and the vibrating mirror caused the light to vibrate. The vibrating light hit a light-sensitive cell in a receiver placed some distance away. The cell changed the light patterns into electrical signals. Earphones changed the signals back into sounds.

Bell believed that his idea of talking on a beam of light would prove to be important. He often called the photophone his greatest invention. Even though the photophone depended on a source of energy that was not constant一the sun―Bell wasn' t a bit discouraged. He felt sure that people would one day talk using beams of light.

Two much more recent developments made Bell' s dream come true. In 1960 ，a scientist built the laser. A laser produces a highly concentrated beam of light. Shortly afterward, other scientists developed a new kind of optical fiber. The optical fiber is a glass thread. The new fiber could carry light beams long distances―as far as several miles.

(   ) 1. According to Bell's own opinion,        is his greatest invention.

A. telephone    B. optical fiber C. photophone    D. laser

(   ) 2. What does "That" refer to in the underlined sentence?

A.  Using a beam of sunlight traveling through the air.

B.  Using electricity to carry sound over wires between two people.

C.  Transmitting human speech on a beam of light.

D.  Light and sound.

(   ) 3. Which statement is true about Bell，s invention of photophone?

A.   The photophone depends on a constant source of energy.

B.   The photophone is based on the invention of the telephone.

C.   Earphones are used to change light into sounds.

D.   The laser and the optical fiber are helpful for Bell' s invention.

(   ) 8. Meanwhile，most analysts expect demand for      materials to remain firm despite the gloomy economic news.

A. ripe    B. average C. raw    D.slim

5. Not        after going on a diet for three months，Jane felt very upset. (lose)

节食三个月没有减轻体重，Jane感到非常沮丧。

(   ) 10. This is not an economical way to get more water;        ，it is very expensive.

A. on the other hand    B. on the contrary

C. in short        D. as a matter of fact

(   ) 6. It was just that casual glimpse that made him        Cynthia,whom he had been

cherishing for a life time.

A. make up of    B. take the place of C. catch sight of    D. run out of

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