—Have you heard that George quit his job?
—Yeah, but I can't________why he did so.
A．put out　B．figure out
C．carry out　D．send out
B
　考查動詞詞組辨析。put out“出版，出產(chǎn)”；figure out“弄明白”；carry out“實施，執(zhí)行”；send out“發(fā)出，分發(fā)”。答句句意：是的，但我弄不明白他為什么要辭掉工作。
練習冊系列答案
相關習題

科目：高中英語 來源：不詳 題型：單選題

Nelson Mandela, who was elected ______ president of South Africa in 1994, is generally regarded as______ father of the country.
A．the; theB．/; theC．/; /D．the; /

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空

閱讀下面短文，并根據(jù)所讀內(nèi)容在表格中的空格處填入恰當?shù)膯卧~。
注意：每個空格只填一個單詞。
“HEARTLESS”— a word you wouldn’t want to use to describe a person. But having his heart removed was what saved Craig Lewis’ life—and what made him the first living “heartless” man.
The 55-year-old，dying of heart disease，was told he only had 12 hours to live， when Billy Cohn and Bud Frazier, doctors from the Texas Heart Institute, decided to try something new. They removed Lewis heart and replaced it with an artificial (人造的) one. Less than a week after the operation, Lewis was able to sit and speak.
Lewis kept on living like a normal person, with only one difference—he didn’t have a heartbeat. The human heart usually pumps blood through our bodies by beating regularly. By contrast, this artificial heart pushes the blood forward with two moving blades(槳葉). If you were to touch Lewis or listen to his chest, you would not feel a heartbeat. If you hooked him up to an EKG(心電圖) machine, the line would be flat.
Scientists have been trying to create a working artificial heart for years. Until now, all artificial hearts either broke down or caused blocks and infections.
But after five years of hard work, Dr Cohn and Dr Frazier developed this artificial heart. It is smaller and quieter than other artificial hearts and can last much longer. They tested it on 38 calves (牛犢) and all of them turned out energetic and healthy. Lewis is the first human proof that the machine is a success.
The doctors will have to work more on the device and decide on a final design before it can be widely used. The US Food and Drug Administration will also need to say that the machine is safe. But this artificial heart looks likely to bring a ray of hope to thousands of patients.
Passage outline
Supporting details
A 小題1:     in the history of medicine
◆ 55-year-old Lewis was on the
小題2:      of death. He was told that he only had 12 hours to live.
◆ Two     American  doctors had his heart
小題3:     and replaced it with an artificial one.
That made Lewis the first living heartless man.
Differing from the human heart
◆ Lewis’ new heart pushes the blood forward with two moving blades.
◆ His heart rate is at 小題4:     with a
小題5:     line on the screen of an EKG
machine.
小題6:     of this artificial heart
◆ It is smarter and quieter than other artificial hearts and can last much longer.
◆ It hasn’t yet broken down. Nor has it got
小題7:     and infected.
Reasons for being小題8:  about this artificial heart.
◆ The doctors will have to further
小題9:     the device before it is massively produced.
◆ Yet this artificial heart looks likely to bring the opportunity of 小題10:   to thousands of patients.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空

請認真閱讀下列短文，并根據(jù)所讀內(nèi)容在文章后表格中的空格里填入最恰當?shù)膯卧~。注意：每空格1個單詞。
Chang'e 3 is a lunar(月球的) exploration mission operated by the China National Space Administration (CNSA), incorporating a robotic lander and China's first lunar rover.
The spacecraft was named after Chang'e, the goddess of the Moon, and is a follow-up to the Chang'e 1 and Chang'e 2 lunar orbiters. The rover was named Yutu following an online poll, after the mythological rabbit that lives on the Moon as a pet of the Moon goddess.
Chang'e 3 achieved lunar orbit on 6 December 2013 and landed on 14 December 2013, becoming the first probe to soft-land on the Moon since Luna 24 in 1976.
In January 2004, the People's Republic of China's lunar orbiter project was formally established. The first Chinese lunar orbiter, Chang'e 1, was launched from Xichang Satellite Launch Center on 24 October 2007 and entered lunar orbit on 5 November. The spacecraft operated until 1 March 2009, when it was intentionally impacted into the surface of the Moon. Data gathered by Chang'e 1 were used to create an accurate 3-D map of the entire lunar surface, assisting site selection for the Chang'e 3 lander.
Chang'e 1's successor, Chang'e 2, was approved on October 2008 and was launched on 1 October 2010 to conduct research from a 100-km-high lunar orbit, in preparation for Chang'e 3's 2013 soft landing. Chang'e 2, though similar in design to Chang'e 1, was equipped with improved instruments and provided higher-resolution imagery of the lunar surface to assist in the planning of the Chang'e 3 mission. 
In March 2012, China began manufacturing the body and payload of the Chang'e 3 lander, which will attempt to perform lunar surface and space studies independently of the mission's mobile rover.
Like its orbiting predecessors, the Chang'e 3 mission is planned as a precursor（先驅）to further robotic lunar exploration missions, including Chang'e 5, a sample return mission planned for 2017. Following these automated missions, a manned landing may be conducted around 2025.
Chang'e 3 will attempt to perform the first direct measurement of the structure and depth of the lunar soil down to a depth of 30 m (98 ft), and investigate the lunar crust(殼) structure down to several hundred meters deep.
The development of the six-wheeled rover began in 2002 and was completed in May 2010. It has a total mass of approximately 120 kg, with a payload capacity of approximately 20 kg. It can perform simple analysis of soil samples and may transmit video in real time. It can navigate inclines(斜坡) and has automatic sensors to prevent it from colliding(碰撞) with other objects.
The rover was successfully deployed from the lander, and it made contact with the lunar surface on 14 December. After taking pictures of each other the lander and rover will start their respective science missions. The rover is designed to explore an area of 3 square kilometres during its 3-month mission, with a maximum travelling distance of 10 km.
 
Title: Chang’e 3
__小題1:__
It is a lunar exploration mission operated by CNSA, incorporating a robotic lander and China's first lunar rover.
Name Source
It was named after the goddess of the Moon, __小題2:__ up the names of Chang'e 1 and Chang'e 2.
 
The
History
of
China’s Lunar Exploration Program
The program
In January 2004，it was formally established.
Chang'e 1
On 24 October 2007, it was launched and entered lunar orbit on 5 November.
On 1 March 2009, it was impacted into the surface of the Moon on purpose.
To help select a proper __小題3:__for Chang’e 3 lander, data about the entire lunar surface were gathered.
 
Chang’e 2
On October 2008, it was approved and launched __小題4:__ years later.
Its mission was to conduct research for Chang’e 3 soft landing.
Although __小題5:__designed, it was better equipped than Chang’e 1.
 
Chang’e 3
Started in March 2012, it achieved lunar orbit on 6 December 2013 and landed 8 days later, becoming the __小題6:__ probe to soft-land on the Moon since Luna 24 in 1976.
The objectives are to measure the structure and depth of lunar soil and investigate the lunar crust to a great __小題7:__.
Chang’e 5
A sample return mission planned for 2017.
Around 2025
A manned landing may be conducted.
 
Information about
the rover
It was began in 2002 and completed in 2010, __小題8:__ about 120 kg with a payload capacity of 20 kg or so.
It has many __小題9:__, from analyzing soil samples to protecting itself.
After the first __小題10:__ with the moon on 14 December, it will stay on the moon for 3 months, exploring an area of 3 square km and travelling a maximum distance of 10 km.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Everybody needs calcium, but it is quite possible for a similar person to be totally healthy by eating only________.
A．a(chǎn)s half much　B．a(chǎn)s much half
C．half as much as　D．half as much

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

(2013·高考江蘇卷)With inspiration from other food cultures，American food culture can take a________ for the better.
A．shareB．chance
C．turnD．lead

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

(2013·高考湖北卷)In much of the animal world，night is the time________for sleep－pure and simple.
A．set asideB．set down
C．set offD．set up

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

(2013·高考安徽卷)It’s much easier to make friends ________ you have similar interests.
A．unlessB．when
C．even thoughD．so that

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

The price of the goods in this shop is too high. I can buy only half the goods I bought in that shop and I’m paying ________.
A．a(chǎn)s three times muchB．a(chǎn)s much three times
C．much as three timesD．three times as much

查看答案和解析>>

同步練習冊答案