Personal relationships ______ over years may be lost when we move houses.
A. building up B. built up C. having built up D. to be built up
高三英语单项填空中等难度题
Personal relationships ______ over years may be lost when we move houses.
A. building up B. built up C. having built up D. to be built up
高三英语单项填空中等难度题查看答案及解析
The lady standing over there may be from the USA, _____ I guess has lost her way.
A. whom B. who
C. which D. where
高三英语单项填空中等难度题查看答案及解析
The lady standing over there may be from the USA, _____ I guess has lost her way.
A. whom B. who
C. which D. where
高三英语单项填空中等难度题查看答案及解析
Be careful when you cross this very busy street. If not, you may _____ run over by a car.
A. have B. get C. become D. turn
高三英语单项填空中等难度题查看答案及解析
. Be careful when you cross this very busy street. If not, you may _______ run over by a car.
| A．have | B．get | C．become | D．turn |
高三英语单项填空简单题查看答案及解析
One day when I was 15 years old, I had some friends over to hang out. While we were making food in the kitchen, my brother came in. He placed his beef next to my ______ one and said, “Courtney, your beef is bigger than mine. You don’t need to ______; you’re already fat enough.” Then he walked out laughing.
Unpleasant ______ on my physical appearance were nothing new. Something inside me gave in to his idea that my legs were ______, and that became the last day that I ever willingly wore ______ until I was 30 years old. For the next 15 years, I spent summer after summer ______ in long pants.
But then I met Ragen Chastain, and she ______ everything. I couldn’t believe that this woman who, like myself, weighed almost 300 pounds was so ______ and happy in her own skin. I ______ as she shared her own journey to recovery and self-love. She talked about how amazing our ______ are, simply because of the things they do every day—like breathing, ______ blood to every cell, blinking and walking.
Walking! I was suddenly ______ how foolish I’d been for so long. There’re people who are born without legs, or who lack ______ working legs, or who lose their legs, and I’d been hiding my perfectly strong, healthy, beautiful legs ______ because I had ______ someone to convince me that they weren’t good enough. The next day, I bought three pairs of shorts and a sundress and spent the entire summer letting my legs ______ the sun and feel the breeze.
The next time anyone comments on your body in a ______ way, look them straight in the eye, smile and say, “If what you see ______ you so much, feel free to practice the ancient art of looking ______ else.” That’s Ragen’s own ______, but I don’t think she’ll mind if you use it.
1.A. small B. plain C. thick D. slim
2.A. walk B. eat C. talk D. cry
3.A. reports B. suggestion C. reflections D. comments
4.A. unnecessary B. unacceptable C. unique D. pants
5.A. shorts B. T-shirts C. socks D. pants
6.A. sleeping B. roasting C. driving D. running
7.A. changed B. solved C. believed D. explained
8.A. sensitive B. generous C. tiresome D. energetic
9.A. laughed B. expected C. waited D. listened
10.A. legs B. weights C. bodies D. images
11.A. pulling B. putting C. preventing D. pumping
12.A. afraid of B. absorbed in C. aware of D. anxious about
13.A. properly B. regularly C. accidentally D. possibly
14.A. in shame B. in panic C. in pride D. in delight
15.A. begged B. allowed C. refused D. invited
16.A. avoid B. see C. cover D. kick
17.A. normal B. special C. different D. negative
18.A. amuses B. excites C. bothers D. hurts
19.A. somewhere B. anywhere C. nowhere D. everywhere
20.A. decision B. question C. creation D. requirement
高三英语完形填空简单题查看答案及解析
C “Over the years the unthinkable has become thinkable and today we sense we are close to being able to alter human heredity(遗传)．” These were the words of David Baltimore of the California Institute of Technology，on December 1st，when he opened a threeday meeting in Washington to discuss the morality and use of human gene editing．Dr Baltimore is an old hand at these sorts of discussions，for he was also a participant in the Asilomar conference，in 1975，which brought scientists together to discuss a safe way of using the thennew technology of recombinant DNA，and whose recommendations influenced a generation of biotechnology researchers．
Four decades on，the need for a similar sort of chinwag has arisen．The International Summit on Human Gene Editing has been held by the national scientific academies of three countries—America，Britain and China．They are particularly concerned about whether gene editing should be used to make heritable changes to the human germ line，something Dr Baltimore described as a deep and troubling question．Like those of Asilomar，the conclusions of this meeting will not be binding．But the hope is that，again like Asilomar，a mixture of common sense and peer pressure will create a world in which scientists are trusted to regulate themselves，rather than having politicians and civil servants do it for them．The meeting is being held against a backdrop of rapid scientific advance．Since 2012 research into a new，easytouse editing tool called CRISPRCas9 has blossomed．This technique involves a piece of RNA (a chemical messenger，which can be used to recognise a target section of DNA) and an enzyme(酶) called a nuclease that can snip unwanted genes out and paste new ones in．
Public interest was aroused in April，when Chinese scientists announced they had edited genes in nonviable(无活力的) human embryos，and again in November when British researchers said they had successfully treated a oneyearold girl who had leukaemia(白血病)，using geneedited Tcells．Tcells are part of the immune system that attack，among other things，tumour cells．The researchers altered Tcells from a healthy donor to encourage them to recognise and kill the patient's cancer，to make them immune to her leukaemia drug，and to ensure they did not attack her healthy cells．
In another recent development，a firm called Edit as Medicine，which is based in Cambridge，Massachusetts，has said it hopes，in 2017，to start human clinical trials of CRISPRCas9 as a treatment for a rare genetic form of blindness known as Leber congenital amaurosis(伯氏先天性黑蒙)．Though other companies are already testing geneediting therapies，these employ older，clunkier forms of the technology that seem likely to have less commercial potential．Moreover，researchers at the Broad Institute，also in Cambridge，said this week that they had made changes to CRISPRCas9 which greatly reduce the rate of editing errors—one of the main obstacles to the technique's medical use．
On the subject of germline editing，Eric Lander，the Broad's head，told the meeting it would be useful only in rare cases and said it might be a good idea to “exercise caution” before making permanent changes to the gene pool．The need for caution is advice that might also be heeded by those pursuing work in animals other than people，and in plants—subjects not being covered by the summit．
1.Which of the following is TRUE about CRISPRCas9?
A．It has fewer side effects．
B．It can modify human gene．
C．It can protect immune system．
D．It has less commercial potential．
2.The underlined word “chinwag” in Paragraph 2 can be replaced by ________．
A．discussion
B．negotiation
C．argument
D．comparison
3.What can be inferred from the passage?
A．Dr．Baltimore started his research on modifying gene in 1975．
B．Scientists' opinions about the use of gene editing are consistent．
C．CRISPRCas9 has been applied to cure Leber congenital amaurosis．
D．More research should be made before the technology comes into wide use．
4.This passage is most probably a ________．
A．science fiction
B．scientific report
C．conference summary
D．commercial advertisement
高三英语阅读理解中等难度题查看答案及解析
"Over the years the unthinkable has become thinkable and today we sense we are close to being able to alter human heredity œ#)." These were the words of David Baltimore of the California Institute of Technology, on December 1st, when he opened a three-day meeting in Washington to discuss the morality and use of human gene editing. Dr Baltimore is an old hand at these sorts of discussions, for he was also a participant in the Asilomar conference, in 1975, which brought scientists together to discuss a safe way of using the then-new tcchnology of recombinant DNA, and whose recommendations influenced a generation of biotechnology researchers.
Four decades on, the need for a similar sort of chin-wag has arisen. The International Summit on Human Gene Editing has been held by the national scientific academies of three countries — America, Britain and China. They are particularly concerned about whether gene editing should be used to make heritable changes to the human germ line, something Dr Baltimore described as a deep and troubling question. Like those of Asilomar, the conclusions of this meeting will not be binding. But the hope is that, again like Asilomar, a mixture of common sense and peer pressure will create a world in which scientists are trusted to regulate themselves, rather than having politicians and civil servants do it for them. The meeting is being held against a backdrop of rapid scientific advance, Since 2012 research into a new, easy-to-use editing tool called CRISPR-Cas9 has blossomed. This technique involves a piece of RNA (a chemical messenger, which can be used to recognise a target section of DNA) and an enzyme (酶) called a nuclease that can snip unwanted genes out and paste new ones in.
Public interest was aroused in April, when Chinese scientists announced they had edited genes in non-viable ( 无活力的) human embryos, and again in November when British researchers said they had successfully treated a one-year-old girl who had leukaemia ( 白血病), using gene-edited T-cells. T-cells are part of the immune system that attack, among other things, tumour cells. The researchers altered T-cells from a healthy donor to encourage them to recognise and kill the patient's cancer, to make them immune to her leukaemia drug, and to ensure they did not attack her healthy cells.
In another recent development, a firm called Edit as Medicine, which is based in Cambridge, Massachusetts, has said it hopes, in 2017, to start human clinical trials of CRISPR-Cas9 as a treatment for a rare genetic form of blindness known as Leber congenital amaurosis (伯氏先天性黑蒙). Though other companies are already testing gene-editing therapies, these employ older, clunkier forms of the technology that seem likely to have less commercial potential. Moreover, researchers at the Broad Institute, also in Cambridge, said this week that they had made changes to CRISPR-Cas9 which greatly reduce the rate of editing errors — one of the main obstacles to the technique's medical use.
On the subject of germ-line editing, Eric Lander, the Broad's head, told the meeting it would be useful only in rare cases and said it might be a good idea to "exercise caution? before making permanent changes to the gene pool. The need for caution is advice that might also be heeded by those pursuing work in animals other than people, and in plants — subjects not being covered by the summit.
1.Which ofthe following is TRUE about CRISPR-Cas9?
A. It has fewer side effects.
B. It can modify human gene.
B. It can protect immune system.
D. It has less commercial potential.
2.The underlined word "chin-wag" in Paragraph 2 can be replaced by______
A. discussion B. negotiation
C. argument D. comparison
3.What can be inferred from the passage?
A.Dr. Baltimore started his research on modiffing gene in 1975.
B. Scientists' opinions about the use of gene editing are consistent.
C. CRISPR-Cas9 has been applied to cure Leber congenital amaurosis.
D. More research should be made before the technology comes into wide use.
4.This passage is most probably a______.
A. science fiction B. scientific report
C. conference summary D. commercial advertisement
高三英语阅读理解中等难度题查看答案及解析
We ________ the bridge for over two years and it will be half a year before it’s completed.
A. are building B. have built
C. have been built D. have been building
高三英语单项填空中等难度题查看答案及解析
听下面一段独白，回答以下小题。
1.When will the race be held this year?
A. On May 11th. B. On May 23rd. C. On May 24th.
2.Where does the race start?
A. At the football ground.
B. On the north side of the park.
C. At the main entrance of the park.
3.What can every runner get?
A. A T-shirt. B. A water bottle. C. A pair of running shoes.
4.Who can run in the race free of charge?
A. Children under 8 years of age.
B. Children between 8 and 15 years of age.
C. Adults registering in advance.
高三英语短文中等难度题查看答案及解析