If you knew a bottle of water had been recycled from urine(尿), would you drink it?Astronauts at the International Space Station(ISS)may soon do so．
NASA(美国航空航天局)said it would use a high-tech machine(高科技机器)to recycle wastewater at the ISS．The machine will recycle everything from sweat(汗), the water for washing hands, shower water, water used for brushing teeth, and even urine, to make drinking water．
It will save NASA millions of dollars each year．At present, each ISS astronaut uses about 4.4 liters(升)of water every day．It costs about ＄24 million a year to transport water up to ISS．NASA says that a liter of water costs about ＄11,000．
The machine will be sent to the ISS in October 2008．NASA hopes it will recycle about 93％ of all water used on the station．
Will the water be clean?Scientists say the wastewater will go through a very complicated process(复杂的过程)．For example, different chemicals will be put in the wastewater; the water will be heated to 130℃ to get rid of bacteria(细菌)．The recycled water is thousands of times better than the water from a city tap, scientists say．
(1)
NASA will use a high-tech machine to recycle wastewater at the ISS to ________．
[ ]
A．
protect the ISS
B．
make astronauts at ISS work harder
C．
provide better water and food for ISS astronauts
D．
save the cost of transporting water up to the ISS
(2)
At present it costs NASA about ________ dollars to transport water up to an astronaut at the ISS a day．
[ ]
A．
4.4 thousand
B．
11 thousand
C．
48.4 thousand
D．
24 million
(3)
Scientists plan to get rid of bacteria in the wastewater by ________．
[ ]
A．
freezing
B．
heating
C．
shaking
D．
precipitating(沉淀)
(4)
The reading mainly tells us something about ________．
[ ]
A．
water recycling
B．
the International Space Station
C．
a high-tech machine
D．
the cost of NASA
(5)
Which of the following sentences is true, according to the passage?
[ ]
A．
The recycled water is much better than that from a city tap．
B．
The high-tech machine will recycle all the water used on the station．
C．
At present, each ISS astronaut uses more water than the people living on the earth．
D．
The high-tech machine can only recycle urine to make water at present．
Most American children eat potatoes．But many children don't know what of the potato is the best for food．Take a knife and cut from the middle of the potato a piece as thin as paper．Hold the piece between your eyes and light．You will see that the potato has skin(皮)，an outside rim(边缘) and an inside part．The outside rim which is right under the skin of the potato，is the most valuable part of all．But this is often thrown away with the skin．Even the skin itself is better for food than the inside．When eating a cooked potato，if you choose the inside and leave the outside，you are throwing the best part of it．If you can't eat the whole potato，eating the outside rim and leaving the inside will do．
(1)
How many parts does the potato have?
A．It has only one part，outside rim．
B．It has two parts，skin and outside rim．
C．It has three parts，skin，outside rim and an inside part．
D．It has four parts，middle，skin，outside rim and an inside part．
[ ]
(2)
What is the best part of a potato?
A．Outside rim． B．Inside part． C．Middle． D．Skin．
[ ]
(3)
What should you eat first if you can't eat the whole potato?
A．Skin only． B．Inside． C．Outside rim． D．Part of it．
[ ]
(4)
In fact the skin is ______．
A．no good at all
B．better than the inside part
C．better than the outside rim
D．as good as the outside rim
[ ]
(5)
What does this passage tell about potatoes?
A．How to cook them．
B．How to plant them．
C．What is made up of a potato．
D．How to eat them．
[ ]
阅读理解
You will have a lot of reading to do in this grade this year．You can do more of it in less time if you learn to read rapidly．
Perhaps you have been told about some habits (习惯) which keep a person from reading fast and have been strongly asked to break those habits which you might have．
Do you still have any of these bad habits?Check yourself by answering“yes”or“no”to these questions．
(1) Do you move your lips (嘴唇) when reading silently?
(2) Do you point to words with your finger as you read?
(3)Do you move your head from side to side as you read?
(4)Do you read one word at a time?
If you answer“yes”to any of these questions,start at once to break the habit．If you move your tips，hold your fingers over them，or hold a piece of paper be-tween your lips while you are reading．Then if your lips move，your will know it and can stop them．
If you point to words，hold the two sides of your book，one side with your left hand，the other side with your right hand．Then you won't have a free finger to use in pointing while reading．If you move your head，place your chin (下巴) in one hand and hold your head still (静止不动的)．
If you read no more than one or two or three words at a time，you need to work very hard in learning to take in (吸收) more words at each glance (一瞥) as your eyes travel across the lines of words．
Even if you do rather fast now，you can learn to read even faster．As you probably have been told，the secret of fast reading is to take in whole groups of words as each glance．Read in through groups and force (迫使) your eyes along the lines of words as fast as you can to make them go．Anyone who practices doing these things will he able to read faster．
(1)
You may hold your fingers over your lips while reading so as ______．
A．to tell others to be silent
B．to feel whether your lips move or not
C．to hold a piece of paper between them
D．to keep yourself from talking to others
[ ]
(2)
When you read，______．
A．don't keep your head still
B．don't hold your books with your hands
C．don't stand up near a desk
D．don't use your finger to point to words
[ ]
(3)
If you learn to read fast，______．
A．you can read more in less time
B．you can write faster
C．you can understand better
D．you can read less in more time
[ ]
(4)
You must _______ those habits that we are talking about in this reading．
A．remember B．have C．get rid of D．keep
[ ]
(5)
This reading is mainly about ______．
A．the way of reading fast
B．the importance of fast reading
C．the bad habits in reading
D．how to speak quickly
[ ]
阅读理解
In England winter is not very cold and summer is not very hot.There is not a great difference between summer and winter.Do you know why?
England has a mild(温和) winter and a cool summer because it is an island eountry.In winter the sea is warmer than the land.The winds from the sea bring warm air to England.In summer the sea is cooler than the land.The winds from the sea bring cool air to England.
The wet winds blow over England all the year.They blow from the southwest and also bring rain to England.So England has a lot of rain all the year.The west of England is wetter than the east.The winds must blow over the highland in the west.They leave more rain here.The east of England is drier than the west.
The four seasons are all three months long.Winter is in December,January and February.Spring lasts from March to May.Summer starts in June and goes on to August.Autumn is from September to November.
(1)
In England winter is _________.
A.cold B.warm C.wetter D.hot
[ ]
(2)
Summer and winter are _________ in England.
A.not the same B.longer than autumn
C.shorter than spring D.nearly the same
[ ]
(3)
Why is winter in England not so cold? Because _________.
A.there is more sunshine there
B.the warm winds in the sea blow over England in winter
C.there are a lot of rivers there
D.there is no wind there
[ ]
(4)
Which of the following sentences is right?
A.There is the same rain in all places in England.
B.There is much more rain in the west of England than in the east.
C.There is no rain in the wes[of England.
D.There is little rain in the east of England.
[ ]
(5)
If you want to visit England，you can go there _________.
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