He returned back to his motherland where he was born after many years．去掉back．题目和参考答案——青夏教育精英家教网—

题目内容

9．He returned back to his motherland where he was born after many years．去掉back．

分析多年以后他回到了生他养他的祖国．

解答答案：去掉back；return作"返回"讲时是不及物动词，相当于"go back/get back/come back..，本身已含有back的意思，后不可再跟back．

点评本题考查动词的用法，考试应在理解单词的意义的基础上掌握一些单词的用法，这样解题时就比较容易了．

练习册系列答案

	A．	is smoking permitted		B．	smoking is permitted
	C．	does smoking permit		D．	smoking does permit

7．假设你是李华，今天上午你和交换生Lucy因小事吵架．下午，你想请她看电影Beauty and Beast作为道歉．请给她写一张便条．
要点：1．表达你的歉意；
2．请她看电影；
3．晚上7：30，万达广场电影院．
注意：1．词数：100左右；
2．可适当增加细节，以使行文连贯；
3．开头和结尾已为你写出，不计入总词数．
Dear Lucy，
I am so sorry that I quarreled with you this morning．I regret having said something unpleasant to you．I didn't control myself well at that time．In order to make it up，I plan to invite you to see a film with me together．（高分句型一）
The film is called Beauty and Beast，which tells a romantic love story between a common girl and a prince，who becomes a beast in the film．（高分句型二）I have bought 2 tickets．And I will wait for you at Wanda Square at 7：00 pm，for the film will begin 30 minutes later．（高分句型三）
I do apologize for what I did again．Please be there on time．
Yours sincerely，
Li Hua．

17．Change is just an empty word you have the experience to do something to get it done．（　　）

4．-The film A Dog's Purpose was moving．
-Yes，it the bond between dogs and humans to the audience．（　　）

14．Dozens of Chicago teenagers on Monday told a small group of elected officials about their need for summer jobs to save for college，pay for food and，in some cases，avoid homelessness．
This summer，Illinois is facing the loss of 18，000jobs for teenagers．The loss comes as teen unemployment in the state has reached a record-high rate of 27.5percent．
Experts say that the slow recovery and the high unemployment rate have forced older workers to take positions for younger workers．
Jim Zeckhauser，the manager of a Chicago social service agency for troubled teens，said he used to be able to place dozens of teens in jobs before the financial crisis．This year，he has been able to place only about seven of the 34teenagers he guides in summer jobs．"It's a struggle to find firms，"he said．
Brent Weiss，owner of Uncle Dan's，an outdoor-gear retailer with locations in Chicago，Evanston and Highland Park，said he is more selective about the workers that he hires，acknowledging that he is more likely to hire college students than teens，and like many other small business he is doing more with fewer workers．
Chicago-area small business say they are taking a wait-and-see approach to expanding their businesses and hiring more workers．They blame increasing gasoline prices and a lack of consumer confidence．
Nationwide，teens ago 16to 19have seen the biggest drop in employment during the past decade．In 2010，the employment rate for that age group was 26percent，the lowest since World war II，according to a report by the Center for Labor Market Studies at Northeastern University In 2000，employment rate for the same group was 45percent．
If the trend continues，only one in four teenagers will hold a job this summer，according to the report．Many of the unemployed will likely be black males living in low-income communities．

29．According to the passage，why do some Chicago teenagers want to take a job？D
A．To know more about the society．
B．to get some career experience．
C．To buy some new clothes．
D．To support their education．
30．Teen workers face competition fromB．
A．adult workers and foreign students
B．older workers and college students
C．younger workers and college students
D．foreign workers and high students
31．According to the passage，which of the following is not the cause of the low teen employment rate？C
A．High gasoline price．
B．The financial crisis．
C．A lack of teenager confidence．
D．The slow economic recovery．
32．It can be inferred that workers in Chicago-area small businesses．A
A．are busier
B．are paid higher
C．have more free time
D．received higher education．

1．

Who could have imagined that a treadmill（跑步机）on wheels would one day become a thing？!？Lopifit is an unusual means of transportation that allows you to power an electric bicycle by walking on a treadmill．
Lopifit founder Bruin Bergmeester says it all started when he asked himself the question"How can I use a treadmill outdoors？"He finally came up with a new design，adding an electric motor，and the Lopifit was born．It's similar to an electric bicycle in that the motor only works when the rider puts power in as well．The Lopifit senses when you walk on the treadmill and uses the motor to turn a drive chain at the back of the treadmill，helping you reach a top speed of 17miles per hour．
To use the Lopifit，simply turn on the battery（电池）and use your foot to slide the treadmill backwards and start the motor．Then get on and enjoy the ride!If you need speed，just walk on the treadmill，and if you want to coast（惯性滑行），all you have to do is stay still and admire the view．To stop，you have two hand breaks．
The Lopifit first hit the streets in 2014and，unsurprisingly，became a hit overnight．That was actually quite challenging for the company，because it started getting calls for orders，but it was nowhere near ready for mass production．The unique treadmill bicycle could be bought this year，and Lopifit is struggling to keep up with demand，although the price is up to $2，115．
Some people consider this means of transportation stupid and unnecessary，although there is a very loyal fan-base of so-called Lopifitters．They simply believe that if you're going to walk，you might as well do it the old-fashioned way．
But the Lopifit does have the special advantage of helping you"walk"really fast without much effort，or walking at cycling speed，if you will．

24．Lopifit is an electric bicycle whichC．
A．can be powered by the drive chain
B．can work without an electric motor
C．works when you walk on the treadmill
D．stops when you slide the treadmill forward
25．What is Paragraph 3 mainly about？D
A．The design of a Lopifit．
B．The function of a Lopifit．
C．The structure of a Lopifit．
D．The operation of a Lopifit．
26．What is probably the author's attitude towards Lopifit？A
A．Confident．B．Concerned．C．Curious．D．Doubtful．

18．Nowadays the doctors are trying their best to reduce the public panic ____ they would be affected by the present disease called"MERS"．（　　）

8．Following news of the potential for life on the recently-discovered TRAPPIST-1system，there may be another competitor ready to take its place．
With the help of the Cassini spacecraft，NASA （National Aeronautics and Space Administration） scientists have picked up the first evidence that chemical reactions are taking place deep below the surface of Enceladus，Saturn's （土星的） sixth-largest moon．This means that there could be life in Enceladus'warm underground seas．
An early study found that liquid oceans exist miles below Enceladus'surface．But to reveal what is happening down there，scientists must rely on the plumes（股）of water that spray（喷射）through cracks in Enceladus'icy surface．In October 2015，NASA sent Cassini into a deep dive into one of the plumes．
Cassini's findings，published on April 13in the journal Science，showed that hydrogen（氢） not only exists on Enceladus，but is also responsible for a chemical reaction between hot rocks and water in the ocean beneath its surface．
This same process on Earth provides energy for entire ecosystems around volcanic vents（火山口）．There，tiny creatures are able to survive without sunlight，using hydrogen and carbon dioxide as fuel in a process known as"methanogenesis（甲烷生成）"．
The discovery of this chemical energy source on Enceladus means it could be a very good candidate to host life．
"Confirmation（确认） that the chemical energy for life exists within the ocean of a small moon of Saturn is an important milestone （里程碑） in our search for habitable （可居住的） worlds beyond Earth，"Linda Spilker，Cassini project scientist at NASA，told the Daily Mail．
Alien life was once only thought possible on habitable planets within the"Goldilocks zone"-far enough from our sun not to be a fireball，but not so far as to be freezing．
Research on Enceladus is still in its early stages，but the recent findings have important meanings for future exploration．
"At present，we know of only one genesis （诞生） of life，the one that led to us，"David Rothery，professor of planetary geosciences （行星与地球科学） from the Open University in the UK，told The Telegraph．
"If we knew that life had started independently in two places in our solar system，then we could be pretty confident that life also got started on some of the tens of billions of planets and moons around other stars in our galaxy，"he said．

24．What is the article mainly about？B
A．The connection between the TRAPPIST-1system and Enceladus．
B．The potential for life on Saturn's moon，Enceladus．
C．The chemical energy source on Enceladus．
D．Scientists'constant search for life in the solar system．
25．Scientists assume that there could be life on Enceladus becauseC．
A．there is evidence of a warm ocean under Enceladus'surface
B．hot rocks and water have been discovered on Enceladus
C．hydrogen discovered on Enceladus could be a chemical energy source
D．the entire ecosystems of Enceladus are somewhat similar to those of Earth
26．According to David Rothery，the recent findings on Enceladus could mean thatD．
A．there is only one genesis of life in our galaxy
B．there could be many habitable planets，but all in the"Goldilocks zone"
C．it won't be long before scientists find a habitable planet beyond Earth
D．alien life could exist on some other planets if it existed on Enceladus．

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