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With his attention________on the shops along the roadside，he knocked an old man down while riding to school.
A concentrating B．concentrated C．to concentrate D．concentrates
答案 B
解析 考查词组，故选B项。
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读短文，根据上下文、首字母或汉语意思填入适当的词
In our 1 world, mobile phones are becoming more and more popular, but students in America are not a 2 to use them in class because of many d 3 and harms．
Mobile phones have become a part of our life now．With mobile phones, we can 4 (连接)our friends and family conveniently and call for help easily when in 5 (麻烦)．
However, it also has a 6 effect on our studies and minds．
Some students are absorbed in using it to play g 7 during class so that they cannot 8 (集中注意力)on the teachers’ words．Other students talk t 9 phones every night till midnight．It does great harm to their h 10 ．Besides, students may even be cheated by some strange messages．
主从复合句
名词性从句：主语、表语、宾语与同位语从句及其连接代词、连词与副词
. It didn’t surprise us at all ________ he was post to Hong Kong.
A) why B) how C) what D) that
查看习题详情和答案>>1 exposition （展览）Auckland Museum pays 2 to this great New Zealander, Sir Edmund Hillary: Everest and Beyond Exhibition at the museum until April 25.
Hillary reached Mt Everest’s 3 on May 29, 1953—just in time 4 the Queen’s Conation （加冕典礼）．
Now 83 and 5 by New Zealand as its greatest 6 countryman, Sir Edmund, a Knight of the Garter, prefers to be called just 7 Ed. He and his wife June were guests of honor at the exhibition opening in February, coinciding（巧合）with the museum’s 150th birthday.
Visitors are 8 into his adventure—packed and charitable world through a
9 treasure chest of his memorabilia（大事记），from a well-worn passport to the ice
10 he used to climb that mountain.
A Nepalese schoolhouse, kitchen and Buddhist temple have been 11 to show the place he has 12 40 years of his charitable soul and money to 13 the Himalayan Trust, building schools, hospitals and all manner of infrastructure（基础设施）in the 14 stricken country.
The exhibition also 15 Ed’s climbs in the Southern Alps, a tractor journey he
16 to the South Pole in 1967 and a trip up the River Ganges by jet boat. 17 the exhibition closes it will go to the United States, to 18 Sir Edmund’s jubilee （50年节）year,
19 a celebratory party in London and a 20 with his Sherpa friends in Kathmandu.
1．A．simple B．large C．detailed D．great
2．A．attention B．respect C．admiration D．honor
3．A．top B．pe ak C．height D．level
4．A．at B．of C．for D．with
5．A．looked upon B．thought about C．looked up D．thought out
6．A．living B．live C．alive D．lively
7．A．short B．plain C．as D．for
8．A．put B．poured C．led D．drawn
9．A．clear B．dear C．real D．new
10．A．knife & n bsp; B．axe C．fork D．spear
11．A．recreated B．recycled C．recovered D．repaired
12．A．spent B．taken C．devoted D．used
13．A．by B．through C．for D．from
14．A．poverty B．storm C．disaster D．earthquakes
15．A．covers B．shows C．tells D．expresses
16．A．paid B．did C．made D．took
17．A．Wh ile B．If C．Since D．When
18．A．sign B．mark C．design D．continue
19．A．beginning with B．joining in C．ending up with D．adding up to
20．A．reunion B．repetition C．review D．recovery
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D
Beyond two or three days，the world’s best weather forecasts are doubtful, and beyond six or seven they are worthless.
The Butterfly Effect is the reason. For small pieces of weather—to a global forecaster，small can mean thunder—storms and blizzards（暴风雪）—any prediction becomes worse rapidly. Errors and uncertainties increase，from dust devils and storms up to continent-size eddies（旋涡）that only satellites can see.
The modern weather models work with net-like points sixty miles apart，and even so，some starting data have to be guessed，since ground stations and satellites cannot see everywhere. But suppose the earth could be covered with sensors placed one foot apart，rising at one-foot intervals all the way to the top of the atmosphere. Suppose every sensor gives perfectly accurate readings of temperature，pressure，humidity（温度）, and any other data a weatherman would want. Exactly at noon a powerful computer takes all the data and calculates what will happen at each point at 12.01, then 12.02，then 12.03…the computer will still be unable to predict whether Princeton will have sun or rain one month away. At noon the spaces between the sensors will hide fluctuations（波动）that the computer will not know about. By 12.01，those fluctuations will already have created small errors one foot away. Soon the errors will have added to the ten-foot scale，and so on up to the size of the globe.
63．A weather forecast ____________ in the world.
A．is reliable within one or two days
B．is doubtful beyond 24 hours
C．becomes useless beyond two or three days
D．is still worthwhile in seven days
64．Usually there is a weather sub-station____________.
A．in every city B．every 60 miles
C．between two cities D．every one foot
65．Which of the following statements is true？
A．People have not placed sensors one foot apart in the atmosphere.
B．Scientists have already put sensors one foot apart in the world.
C．Every sensor gives perfectly accurate data a weatherman wants.
D．Ground weather stations and satellites can see every place on earth.
66．Our computer will not be able to know about fluctuations because ____________.
A．the sensors are not good enough
B．they are hidden by the spaces between the sensors
C．they are too far away
D．they move very fast