题目内容
To ________ is to show up or become visible (看得见的).
A. appear B. disappear C. act
—Could you tell me _____ the bike yesterday?
—Sorry, she didn’t tell me about that.
A. where she bought B. why she has bought
C. that she bought D. how did she buy
On June 26, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could now read the whole “map” of the human body: DNA．DNA is something that everybody has, and it tells the body what to do．DNA is the reason that we look like our mother and father, because we get some of their DNA to make our own．
People have been trying to understand the human body for a long time．In 1860, Gregor Mendel discovered a special reason why we look the same as other people in our family．It is because of small things named “genes” in our body．In 1953, James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language．
In 1961, Marshall Nirenberg and Johann Mattaei found a message in DNA showing how DNA tells the cell (细胞) to build its parts．Scientists have now found all the words in the DNA map, but we still do not understand what they all do．By understanding what just one “word” means, we can help save more people from several illnesses．
Most people hope that this will help make better medicine and help sick people．Other people worry that when people begin to know more words and find out lots of other information, we might use it in a wrong way, just to make people more attractive, or stop sick people from getting jobs．Man will have to meet a lot of trouble if DNA technology (技术) isn’t limited in use．
1.When did we first know why we look like other people in our family?
A. In 1860． B. In 1953． C. In 1961． D. In 2000．
2.What does the underlined word “genes” mean in the passage?
A. The “map” of DNA． B. A special language．
C. Small parts of DNA． D. Several illnesses．
3.What did the two scientists first discover in 1961?
A. The “map” of DNA． B. A new illness．
C. The language of DNA． D. A message of DNA．
4.What can we do if we understand some “words” of the language inside the body?
A. Make people get new jobs． B. Make medicine for new illnesses．
C. Make maps of human． D. Make people less attractive．
5.What do people think about DNA technology?
A. It can cause good or bad results． B. It can cause good results．
C. It can cause good results but won’t work． D. It can cause only bad results．
—Why are you looking __________ in class all day?
—Because I can’t finish my homework until eleven every night.
A. awake B. asleep C. sleeping D. sleepy
Can trees talk? Yes-but not in words. Scientists have reasons to believe that trees do communicate with each other. Not long ago, researchers learned some surprising things. First a willow tree(柳树) attacked in the woods by caterpillars (毛毛虫) changed the chemistry of its leaves and made them taste so terrible that the caterpillars got tired of the leaves and stopped eating them. The even more astonishing, the tree sent out a special vapor-a signal causing its neighbors to change the chemistry of their own leaves and make them less tasty.
Communication, of course, doesn’t need to be always in words. We can talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar(花蜜) for honey. So why shouldn’t trees have ways of sending messages?
1.When attacked, a window tree will protect itself by ________.
A. changing its leaves’ chemistry B. changing its leaves’ colour
C. talking to caterpillars D. sending out a special vapour
2.From the passage we know that caterpillars _________.
A. like willow trees B. enjoy eating fallen leaves
C. feed on willow tree leaves D. could communicate with willow trees
3.Caterpillars will stop eating willow trees leaves which __________ .
A. have a chemical change and become tasteless B. have a pleasant taste
C. are being attacked D. are communicating
4.According to the passage, how do willow trees communicate with each other ?
A. They talk in words. B. They send out a special vapour.
C. They wave their leaves. D. they make special sounds.
If you ________ someone, you give them confidence, for example by letting them know that what they are doing is good and telling them that they should continue to do it.
A. support B. encourage C. please
People can produce fresh water from the sea now.
A. steal B. make C. collect
—What do you do _________ classes to relax(放松)?
--Listen to music or walk around the school.
A. over B. through C. between D. of
五、语法填空
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中单词的适当形式填空。
Chen Guanming, a 61?year?old Chinese farmer, 1.(choose) to ride his bicycle all the way from China to Rio during the Rio Olympics. He
called 2.(he) “Olympic madman”. This was the 3.(three) Olympics he had. People in Brazil welcomed him in the 4.(friendly)way after he arrived in Rio.
Seventeen years ago, he started his crazy Olympic adventure(冒险): he traveled around China before the 2008 Beijing Olympics started. Then he went to London Olympics in 2012. In 2016, he went to Rio Olympics. He planned 5.(finish) his travel around the world in Tokyo for the 2020 Olympics.
He didn't have money, 6. people he met on the road gave him a lot of help. So he was able to ride his bicycle to Olympics all the time.
Riding to Olympics was 7. enjoyable experience. Chen said, “I do it to follow the Olympic spirit. My biggest hope is to encourage people not to be afraid 8. problems.” Although he couldn't watch the games in the stadiums, he was very happy by 9.(try) his best to join the Olympics. That's 10. the Olympics are about.
Unluckily, Chen had a car accident(车祸) on October 18, 2017. He died because of that.
