题目内容

14．The wide spread of super hybrid rice around the world ______ the lives of millions and millions of people suffering from hunger to a great level．（　　）
A．has improvedB．is improving
C．improvedD．has been improving

分析 超级杂交水稻在世界范围内的广泛传播，使亿万遭受着饥饿的人们的生活提高到了很高的水平．

解答 答案：A
分析句意可知，此处表示过去的动作或状态对现在产生的影响或造成的后果，即：亿万遭受着饥饿的人们已经逐步摆脱饥饿的困扰，所以这里应使用现在完成时；故选A．

点评 本题考查了现在完成时强调"影响性"的用法；做本题时，需要了解现在完成时除了强调动作的持续性以外，它还强调过去的动作对现在产生的影响以及造成的结果；例如：I have already seen the film．我已经看过这部电影了．（对现在的影响是：我知道电影的内容）；I have lost my key．我把钥匙弄丢了．（造成的结果是：我进不了门了．）

练习册系列答案
相关题目
9．He was      a busy man        after a long delay he got around to writing the letter．（　　）
A．so；thatB．such；thatC．such；/D．so；/
5．When the teacher came in，she found two students ______ by the window ______ books．（　　）
A．seated； readingB．seated； read
C．seating； readD．seating； reading
2．Facebook（脸谱网）类似我们中国的QQ，在成立后很短的时间内，就拥有了众多的用户．Jane 是其中的一名用户，她谈到了Facebook的一些情况．请从下列A、B、C、D、E、F中选出与她的描述相匹配的主题．选项中有一项是多余选项．
A．Facebook's advertising 
B．Typical activities on Facebook
C．Suggestions about the future of Facebook
D．Trust with Facebook in personal information
E．Product purchase following Facebook's friends  
F．People's attitude towards the development of Facebook
61．B
Jane's description：The most common activity I use Facebook for is to see what people are up to．I like to look through friends'photo albums to see where they've been and who they're with．It's also a nice way to message friends casually.1 created a Facebook group for a certain club，so I just send out messages to the group when a meeting or event is coming up．
62．F
Jane's description：When Facebook was first started，everyone in my age wanted to be on it．The first version didn't have any of the fancy things-we could just message，play poke and befriend．It was too Hat．When they started to add new features like the wall，photo albums，video capabilities，and groups，people became more interested．But then Facebook took it too far．Now I find Facebook has quite a few useless features'prefer an older version of just the basics-messaging，walls，photos-and groups．
63．D
Jane's description：I don't add anything too personal to my profile．My only concern is that friends can post pictures of me that I don't want to share．I download them but they will still be on the Internet．I don't think that's a good idea．I think when you don't want a photo to be shared，it should be deleted from the photo album．
64．E
Jane's description：It wouldn't bother me one bit．It's the same as any other recommendation method．I think it's a good place to sell/buy．You see your friends are into it，so you feel the connection right there-it seems like a great time to make a purchase．If Facebook had this service setup，people could just go on to see what new songs their friends are listening to-one click and they can purchase the songs on music websites，or rent new movies on movie websites etc．
65．C
Jane's description：If Facebook keeps trying to stick in useless applications to attract advertisers，it may sink in the future．But if it allows users to go to music or movie websites directly from their friends profiles，it may become the new social networking search engine that people use to look through their friends stuff when they need advice about what to buy．If they include a feature like favorite stores to shop at，they will definitely expand on the possibilities．
9．Junk is everywhere，even in space．But getting rid of space junk is much harder than simply cleaning your bedroom．Space junk travels at 8 kilometers a second，according to an article in the Guardian．Catching it is a bit of a challenge．
     Luckily，scientists at the Swiss space center have a new cleaning plan．Theyare about to send a"cleaner satellite"into space within the next five year？．It will clean up space junk，according to a report in the Guardian．
     Named"Clean Space One"，the Swiss satellite finds its target and moves close to it．When it reaches its target，it will catch the junk with a gripping claw （抓手）．This is not going to be an easy task because both the satellite and the junk are traveling so fast．
     Once Clean Space One has caught the junk，all it has to do to get rid of it is to fly back to Earth．This is because the junk will bum up when traveling through the atmosphere．The satellite itself will burn up a'，the same time．
     Ever since people started to send objects into space more than 50 years ago，there has been junk in space．Junk on Earth like food wrappers （包装纸）or waste paper is also a problem．But space junk is mainly made up of exploded rockets and broken satellites．If no one cleans them away，they just keep traveling around Earth．
     So far，NASA has found 16.000 pieces of junk that are larger than 10cm in diameter（直径）and more than 500，000 pieces measuring between 1cm and 10cm．You can imagine how many even smaller ones there are in space．
     Space junk is dangerous for spacecraft （飞船） and the International Space Station．Even a very small piece could seriously damage-or even destroy-a satellite or space-craft if it collided （碰撞） with the junk．The International Space Station has to regularly change its orbit to avoid space junk，
     Space junk might also be a danger to humans．During the last four months，three very large spacecraft have fallen to Earth．Fortunately，no one was hurt because the junk landed in the ocean．
45．According to the article，space junkD．
    A．travels at the same speed as satellites
    B．could be cleared away within five years
    C．travels at 8 kilometers per hour
    D．will cause a lot of trouble to space stations
46．What will happen to the space junk if it is not cleaned up？C
    A．It will explode in a few years．
    B．It will drift away from Earth eventually．
    C．It will keep traveling around Earth．
    D．It will gather and become a large mass．
47．Which of the following is TRUE about a"cleaner satellite"？B
    A．The junk is dealt with after it reaches Earth．
    B．Catching space junk is difficult for a satellite．
    C．The'satellite can catch several pieces of junk at once．
    D．The satellite goes back to space after it has finished its task．
48．Which of the following statements is TRUE？A
    A．The history of space junk dates back 50 years．
    B．Space stations travel in the same orbit as the junk．
    C．Space junk is harmless to people on Earth．
    D．It's impossible to stop space junk from colliding with spacecrafts．
19．Listening to loud music with mp3 players          caused hearing loss in some teenagers．（　　）
A．hasB．haveC．isD．are
6．_____，I would like to thank Professor Osterhaus for offering me the chance to do this study，and for all the support throughout the study period．（　　）
A．In the beginningB．At first
C．To begin withD．To start
3．-My best friend's in a bad mood．
-How about ________ her some flowers？（　　）
A．giveB．givenC．to giveD．giving
4．You don't sound eenthusiastic （热心） about the idea．

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网