of all was that not a sound could be heard. A．It frightened us most B．The thing that most frightened us C．We were most frightened by D．What frightened us most 题目和参考答案——青夏教育精英家教网—

What do you do if you are hit in the mouth and one of your teeth is knocked out? A dentist(牙医)may be able to put the tooth back in for you, but you have to get to the dentist first．In the meantime, you have to store the tooth so that it will stay healthy．

The simplest thing to do is put the tooth back into your mouth, or you could put it in milk．Frank Courts, a dentist at the University of Florida, worked with other researchers to find the safest way of keeping knocked-out teeth．He tried putting teeth into milk, into water, and into cell-culture medium(细胞培养液)．He also tried, just drying the teeth in the open air．He used teeth that had to be removed from people’s mouths for various reasons．The teeth were put into one of the solutions(溶液)or stored in the air for one hour．Then cells from the root of the teeth were scraped-off the teeth．Dr．Courts and the others then studied how healthy these cells were．

The cell-culture medium worked best to keep a knocked-out tooth healthy outside the mouth．However, few people keep cell-culture medium handy at home or in school．

The next best thing was milk．But Dr．Courts said that the best thing of all was to wash the tooth and put it right back into its socket(牙槽)in the mouth．For some people, though, this is just too painful or upsetting．So milk will do, until you get your tooth (and your mouth)to a dentist．

This passage is mainly about ．

A. how a dentist can save a knocked-out tooth

B. how to keep a knocked-out tooth healthy

C．how Dr．Courts and other researchers made their experiments

D．how to put a knocked-out tooth back into its socket

The best way to keep a knocked-out tooth healthy outside the mouth is to store it .

A．in cell-culture medium B．in milk C．in water D．in the open air

Milk can be used instead of cell-culture medium to put a knocked-out tooth in because ．

A．milk works better to keep the tooth healthy B．milk causes less pain

C．cell-culture medium is not usually handy D．cell-culture medium is more expensive

“Dr．Courts said that the best of al1 was to wash the tooth and put it right back into its socket in the mouth．”In the sentence, the word “best” means .

A．cheapest and healthiest B．least painful and cheapest

C．quickest and least painful D．easiest and healthiest

Frederick Law Olmsted （1822 - 1903）, a Connecticut farm boy, saw his first public park in Liverpool, England, as he accompanied his brother on a walking tour. He was impressed by the park’s winding paths, open fields, lakes and bridges. Perhaps the most wonderful things of all was that the park was open to everyone.
A moment beginning in 1840 to set aside park land on New York City’s Manhattan Island has successful result in 1856 with the purchase of 840 acres of rocky and swampy （沼泽） land, bought with about $ 5 million in state funds. Olmsted’s chance meeting with a project organizer led to his applying for the job of park manager. In 1857 Olmsted was appointed manager of the proposed park, and the clearing of the site began.
Calvert Vaux, a British architect, asked Olmsted to collaborate with him on a park design, and Olmsted agreed. Vaux saw the park as a work of art, while Olmsted saw the park as a place for people to escape the noise of the city. Together they invented a plan that would give the persons and animals living in the city a quiet, green park and would also preserve and increase the good qualities of the natural features of the land. The commissioners voted in favor of Vaux and Olmsted’s plan, and in 1858, the two became the official designers of New York City’s Central Park.
It took millions of cartloads of topsoil to build Central park’s gentle slopes, shady glens, and steep, rocky ravines. Five million trees were planted, a water – supply system was laid, and bridges, arches, roads and paths were constructed. The park officially opened in 1876, and today, well over a century later, people still escape the noise of the city in Olmsted and Vaux’s great work of art.
53．What is the text mainly about?
A．A history of the planning of Central park.
B．An engineering plan for Central Park.
C．A biography of Frederick Law Olmsted.
D．A guided walking tour of Central park.
54．Olmsted became manager of Central Park because of         .
A．his friendship with Calvert Vaux
B．his hard work in clearing the land
C．his winning a design competition
D．a chance meeting with one of the park’s organizers
55．The underlined word “collaborate” in the third paragraph means         .
A．disagree    B．comment   C．vote   D．work together
56．Which of the following is true about Central Park?
A．It is out of date nowadays.
B．The designers came from the same country.
C．It is an old park in America.
D．It is only for people who can well afford it.

______ made him unhappiest of all was ______ he had nowhere to unburden himself.

A．What; what B．What; that C．That; what D．That; because

I thought my luck had run out at the end of the summer holiday. It was not the 31 of the new term that did it, but the 32 military training. My 33 nightmare(噩梦) had finally come true.

The weather was 34 hot when we were training. Sweat dropped from every part of my body. I 35 as if my mouth was going to catch fire. 36 was the only thing I could think about. It was the first time in my life that I have ever really felt 37 .

However, we had to stand completely 38 all day. The drill-master(教官) were very strict with us. They only 39 us to sit directly on the ground for a few minutes. My heels ached and I had a blister(水泡) on my 40 .

Believe me, this was not the most 41 part. What I couldn’t 42 most of all was the smell of the toilets. It left such a deep impression on me that I can almost smell it right now.I guess most of the other students 43 the same experience that I had. I often thought of giving up and going back home. 44 , I didn’t.

One day, our PE teacher came to watch our 45 for a while. Then he 46 to join the national flag squad(队). “You movement is the best of all,” he praised me. It was so 47 ! I almost couldn’t believe my ears. It was a great honor to be chosen for the squad.

From that day on, I worked much harder than before because I knew I was going to 48 the national flag. Every Monday, thousands of eyes would be 49 on me. Now military training has finished and I have become a flag protector in my school. Every time I raise the flag, I know all my hard work has 50 .

1. A．imagination B．course C．start D．end

2. A．wonderful B．simple C．important D．tough

3. A．most B．worst C．best D．least

4. A．unbearably B．necessarily C．completely D．regularly

5. A．believed B．supposed C．felt D．considered

6. A．Rest B．Water C．Music D．Fruit

7. A．sleepy B．helpless C．thirsty D．useless

8. A．quiet B．silent C．calm D．still

9. A．allowed B．ordered C．kept D．made

10. A．legs B．hands C．feet D．arms

11. A．wonderful B．exciting C．popular D．painful

12. A．prevent B．need C．handle D．stand

13. A．behaved B．shared C．belonged D．presented

14. A．Naturally B．Generally C．Fortunately D．Especially

15. A．performance B．practice C．students D．exercise

16. A．took me out B．picked me out C．gave me out D．let me out

17. A．awful B．rare C．amazing D．interesting

18. A．lift B．protect C．catch D．hold

19. A．focusing B．turning C．changing D．moving

20. A．turned off B．got off C．taken off D．paid off

What do you do if you are hit in the mouth and one of your teeth is knocked out? A dentist(牙医)may be able to put the tooth back in for you, but you have to get to the dentist first．In the meantime, you have to store the tooth so that it will stay healthy．

The simplest thing to do is put the tooth back into your mouth, or you could put it in milk．Frank Courts, a dentist at the University of Florida, worked with other researchers to find the safest way of keeping knocked-out teeth．He tried putting teeth into milk, into water, and into cell-culture medium(细胞培养液)．He also tried, just drying the teeth in the open air．He used teeth that had to be removed from people’s mouths for various reasons．The teeth were put into one of the solutions(溶液)or stored in the air for one hour．Then cells from the root of the teeth were scraped-off the teeth．Dr．Courts and the others then studied how healthy these cells were．

The cell-culture medium worked best to keep a knocked-out tooth healthy outside the mouth．However, few people keep cell-culture medium handy at home or in school．

The next best thing was milk．But Dr．Courts said that the best thing of all was to wash the tooth and put it right back into its socket(牙槽)in the mouth．For some people, though, this is just too painful or upsetting．So milk will do, until you get your tooth (and your mouth)to a dentist．

1.This passage is mainly about ．

A. how a dentist can save a knocked-out tooth

B. how to keep a knocked-out tooth healthy

C．how Dr．Courts and other researchers made their experiments

D．how to put a knocked-out tooth back into its socket

2.The best way to keep a knocked-out tooth healthy outside the mouth is to store it .

A．in cell-culture medium B．in milk C．in water D．in the open air

3.Milk can be used instead of cell-culture medium to put a knocked-out tooth in because ．

A．milk works better to keep the tooth healthy B．milk causes less pain

C．cell-culture medium is not usually handy D．cell-culture medium is more expensive

4.“Dr．Courts said that the best of al1 was to wash the tooth and put it right back into its socket in the mouth．”In the sentence, the word “best” means .

A．cheapest and healthiest B．least painful and cheapest

C．quickest and least painful D．easiest and healthiest

A．It frightened us most	B．The thing that most frightened us
C．We were most frightened by	D．What frightened us most

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