摘要: Through a after class, we learned how to strengthen our perseverance.

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A dam is a man-made structure built across a river. Most dams are built to control a river’s water flow, improve navigation and control flooding. However, some dams are built to produce hydro-electric power.

Hydro-electric power is produced as water passes through a dam, and into a river below. The more water that passes through a dam, the more energy is produced. Once a dam is built, a man-made lake is created behind the dam.

Electricity is produced by a kind of equipment called a turbine(水轮机). Turbines contain metal coils(线圈) surrounded by magnets(磁铁). When the magnets move round rapidly over the metal coils, electricity is produced. Turbines are located inside dams. The falling water makes the magnets go around the coils.

Dams provide clean energy, but they can also harm the environment. Species that use rivers to reproduce are often hurt by dams. In the Northwest of the US, the population of fishes has dropped from 16 million to 2.5 million since hydro-electric plants were built on the Columbia River. Dams all over the world have hurt some species. 
  The highest dam in the Unites States is located near Oroville, California. The Oroville Dam towers 230 meters and is more than a mile wide. This dam was built in 1968, 22 years after the Hoover Dam. The Hoover Dam, on the Nevada-Arizona border controls the Colorado river. It is 221 meters high and has 2.6 million hectare-meters of water.

The highest dam in the world is the Nurek Dam on the Vakhsh River in Tadzikistan, a country in central Asia. This dam is 300 meters tall. 

1. Which of the following statements is NOT true according to the passage?       

A. Some dams are built for controlling a river’s water flow.

B. Hydro-electric power is usually produced through a dam.

C. Dams can offer energy and they are harmless to the environment.

D. Generally speaking, where there is a dam, there is a man-made lake.

2. The third paragraph mainly tells us _____.          

A. how hydro-electric power is produced

B. What a turbine is and how it works

C. how the magnets and the metal coils work

D. how the falling water passes through a turbine          

3. The dam which controls the Colorado river is ____.         

A. the Oroville Dam B. the Hoover Dam C. the Nurek Dam D. the Vakhsh Dam

 

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阅读理解

  Monday:Here I am, in the middle of nowhere.This camping trip idea is not getting off to a very good start.It's raining and the tent leaks.The hiking seemed to take forever, and I still can't understand how it could all have been up hill!How did I ever let my brother talk me into this?When we get home-if we ever get home-he's going to have to do something great to get back on my good side.Maybe he should sponsor a shopping spree(狂购)at the mall!

  Tuesday:Things are looking up.The sun came out today, so we were able to leave the tents and dry out.We're camped at the edge of a small lake that I couldn't see before because of the rain and fog.The mountains are all around us, and the forest is absolutely beautiful.We spent most of the day dragging out everything out of our backpacks or tents and putting it where the sun could dry it out.Later in the afternoon we tried to catch the fish for dinner, hut the fish were smarter than we were.At night we built a fire and sang songs happily.

  Wednesday:We hiked to the far side of the lake and climbed to the top of a small peak.From there we could see how high the other mountains were and how far the forest spread around us.On the way up we passed through a snowfield!

  Thursday:I caught my first fish!We followed the stream that fed the lake.After about two miles, we came to a section that Carol said looked“fishy”.She had a pack rod(竿), which can be carried in a backpack.I asked to cast it, and I caught a fish on my first try.Carol caught a few more.But they were just too pretty to eat for lunch, so we put them back in the stream.

  Friday:I can't believe we are going home already.It will be nice to get a hot shower, sleep in a real bed, and eat junk food, but the trip has been wonderful.We're already talking about another camping adventure next year where we canoe down a river.It's hard to believe, but I think this city girl has a little country blood in her veins.

(1)

The writer went on this camping trip because ________.

[  ]

A.

she enjoyed camping

B.

she wanted to go fishing

C.

she was influenced by her brother

D.

lie was tired of staying home

(2)

The whole morning of Tuesday, the writer ________.

[  ]

A.

hiked along the lake

B.

dried out her belongings

C.

climbed the mountain

D.

caught the fish for dinner

(3)

It can be inferred that Carol had a pack rod with her because ________.

[  ]

A.

she could not afford to buy a regular fishing pole

B.

she needed it to get their main source of food

C.

she thought the writer of the journal might need it

D.

she expected to go fishing while they were hiking

(4)

It is likely that the writer will ________.

[  ]

A.

go on another camping trip

B.

invite Carol to go fishing together

C.

make her brother buy her something

D.

convince tier brother to go camping

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完形填空

阅读短文,掌握其大意,然后从各题所给的四个选项(A、B、C和D)中,选出最佳选项。

  One day on the way to school, a little boy found a cocoon (茧) of a butterfly and watched it almost every day.One day, it started to break through a small   1   in the cocoon, but it   2   greatly.Finally, it seemed it couldn’t succeed.

  The boy felt   3   for the butterfly because he knew it was going to die   4   it didn’t get out.So he ran into the house and got a pair of   5   and cut the cocoon a little.The butterfly came out and was   6  

  The only strange thing was that the butterfly had a swollen (肿胀的) body and dry   7  .The boy kept waiting for the swelling to go down and for the wings to grow, but   8   didn’t.The butterfly crawled around unable to   9   and then it died an early death.

  Therefore, he learned that the butterfly was supposed to struggle to get out of the cocoon.In fact, the struggle to get out of the cocoon   10   the fluid out of its body and into its wings.  11   the struggle, the butterfly couldn’t grow, and would   12   fly.By trying to   13   the butterfly, the boy   14   hurt it.

  So if you are struggling with something, it’s probably   15   way of telling you that you are supposed to struggle.The struggle is   16   will make you stronger.The bigger you struggle, the stronger you become.

  Let this   17   help you to remember to let people have their struggle.When we do   18   for other people without their   19   , we hurt them and   20   them growing.

(1)

[  ]

A.

room

B.

hole

C.

place

D.

eye

(2)

[  ]

A.

struggled

B.

shouted

C.

changed

D.

waved

(3)

[  ]

A.

ashamed

B.

satisfied

C.

happy

D.

bad

(4)

[  ]

A.

though

B.

if

C.

since

D.

while

(5)

[  ]

A.

knives

B.

trousers

C.

scissors

D.

shoes

(6)

[  ]

A.

free

B.

dead

C.

tired

D.

alive

(7)

[  ]

A.

wings

B.

feather

C.

stomach

D.

legs

(8)

[  ]

A.

it

B.

you

C.

they

D.

he

(9)

[  ]

A.

walk

B.

fly

C.

move

D.

run

(10)

[  ]

A.

pulled

B.

dropped

C.

pushed

D.

flowed

(11)

[  ]

A.

Without

B.

By

C.

With

D.

For

(12)

[  ]

A.

seldom

B.

hardly

C.

ever

D.

never

(13)

[  ]

A.

watch

B.

kill

C.

help

D.

love

(14)

[  ]

A.

actually

B.

gradually

C.

slowly

D.

generally

(15)

[  ]

A.

people’s

B.

science’s

C.

life’s

D.

nature’s

(16)

[  ]

A.

that

B.

what

C.

how

D.

when

(17)

[  ]

A.

passage

B.

boy

C.

speech

D.

lesson

(18)

[  ]

A.

enough

B.

too much

C.

more than

D.

far from

(19)

[  ]

A.

permission

B.

order

C.

attention

D.

request

(20)

[  ]

A.

keep

B.

imagine

C.

prevent

D.

force

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完形填空

  Hoping to award her young son's progress on the piano, a mother hopefully took her boy to a Paderewski concert.After they were   1  , gladly, the mother   2   a friend in the audience and walked down the aisle to   3   her.

    4  the opportunity to explore the wonders of the concert hall, the little boy rose and   5   explored his way through a door   6  “NO ADMITTANCE”.When the house lights dimmed and the   7   was about to begin, the mother said goodbye to her friend and returned to her seat, only to find that the child was missing.

    8  , the curtains parted and spotlights focused on the impressive piano on   9  .In horror, the mother saw her little boy sitting at the keyboard,   10   picking out “Twinkle, Twinkly Little Star”.

  At that moment, the great piano master made his   11  , quickly moved to the piano, and   12   in the boy's ear, “Don't quit.Keep playing.”

  Then leaning over, Paderewsik reached down with his   13   hand and began filling in a bass part.Soon his right arm reached around to the other side of the child and he added a running obbligato (助奏).Together, the old master and the boy   14   a frightening situation into a wonderfully creative experience.The   15   was attracted completely.

  Actually, that's the way it is in life.What we can accomplish on our own is   16   worthy of notice.We try our best,   17   the results aren't exactly graceful flowing music.But when we   18   in the hands of a Greater Power, our life's work truly can be beautiful.

    19   you set out to accomplish great feats,   20   carefully.You can hear the voice of the master, whispering in your ear, “Don't quit.Keep playing.”

(1)

[  ]

A.

seated

B.

checked

C.

examined

D.

introduced

(2)

[  ]

A.

watched

B.

phoned

C.

spotted

D.

stared

(3)

[  ]

A.

visit

B.

greet

C.

welcome

D.

congratulate

(4)

[  ]

A.

Seizing

B.

Giving

C.

Holding

D.

Searching

(5)

[  ]

A.

particularly

B.

frequently

C.

unhurriedly

D.

eventually

(6)

[  ]

A.

signed

B.

marked

C.

wrote

D.

suggested

(7)

[  ]

A.

story

B.

music

C.

concert

D.

record

(8)

[  ]

A.

Suddenly

B.

Terribly

C.

Hopefully

D.

Possibly

(9)

[  ]

A.

screen

B.

stage

C.

ground

D.

curtain

(10)

[  ]

A.

busily

B.

responsibly

C.

happily

D.

indifferently

(11)

[  ]

A.

decision

B.

entrance

C.

mind

D.

effort

(12)

[  ]

A.

whistled

B.

praised

C.

whispered

D.

talked

(13)

[  ]

A.

shaking

B.

broken

C.

right

D.

left

(14)

[  ]

A.

transformed

B.

solved

C.

faced

D.

created

(15)

[  ]

A.

customer

B.

audience

C.

consumer

D.

staff

(16)

[  ]

A.

certainly

B.

always

C.

hardly

D.

probably

(17)

[  ]

A.

but

B.

because

C.

so

D.

though

(18)

[  ]

A.

trust

B.

live

C.

exist

D.

lie

(19)

[  ]

A.

Even if

B.

Next time

C.

As if

D.

First time

(20)

[  ]

A.

treat

B.

observe

C.

do

D.

listen

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