题目内容

【题目】More and more public schools in America make it a rule that students must finish a certain amount of community service1they are allowed to graduate from high school.They work on projects like making the environment better or2 (feed) homeless people.

Many school systems in the United States now ask students3(do) some kinds of community service as part of their studies.Students involved in service projects help4(they) as well as their communities.They learn about the needs of people and aid5(organize).For this reason,holidays6(become) the prime period for volunteer work so far.Volunteers get no pay,but experts point out that it is7excellent opportunity to learn and practice new skills.

According to the statistics,more than 60% of young Americans have participated8different kinds of community service,such as cooking for homeless people,or painting old buildings,etc.Some students like to do their volunteer work in9(centre) parts of America,but the majority of teens prefer to do it in their hometowns.Tom,a 16-year-old middle school student in California,often10(do) community service in a local hospital.He works 16 hours every week either receiving calls at the information desk,or helping push patients back to their wards.

【答案】

1before

2feeding

3to do

4themselves

5organizations

6have become

7an

8in

9central

10does

【解析】本文是一篇说明文。主要说明了美国的公立大学规定,在学生从高中毕业之前必须完成一定数量的社区服务,并讲了社区服务对于学生自身和社区的好处。

1根据句意,要求学生在从高中毕业之前,一定完成一定数量的社区服务。故填before。

2or前后连接两个并列成分,应保持相同的形式。or前面的动词用了-ing形式,所以之后的动词也应用-ing形式。故填feeding。

3ask sb. to do sth.是固定搭配。故填 to do。

4对他们自身有帮助。故填themselves。

5aid sth./sb.意为帮助某事或某人,其后应用名词,而此处不仅指一个组织。故填organizations。

6根据后面的so far可知此句时态应用现在完成时。故填have become。

7元音前的不定冠词应用an。故填an。

8participate in为固定搭配,意为参加。故填in。

9形容词修饰名词,故此处应用centre的形容词形式。故填central。

10该句主语为Tom为第三人称,do的第三人称形式为does。故填does。

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As we know, DNA testing is very useful for crime fighting. But now crime fighters could have a new tool at hand. Researchers have developed a cutting-edge (前沿的) technique to identify human hair. Their test is quicker than DNA analysis techniques currently used by the police.
DNA testing is commonly used for identification because DNA is unique to each individual. However, environmental and chemical processes can degrade(降解) DNA, limiting its usefulness over time. Protein (蛋白质) in hair, on the other hand, is more stable than DNA but can also have variations (变异体) that may be unique to the individual.
“Our analysis process can be used universally, ”says Ms. Huang, “One of our samples even included dyed hair and the test was 100 per cent accurate. The test was able to distinguish East Asians, Caucasians and South Asians.”
Dr. Beauchemin says she has got in touch with law enforcement agencies about using the new technology. She is also planning to collect more hair samples and continue her research with a goal of finding where exactly in the world hair sample is from, to look for more races and determine specific age.
“We are in a very similar place with protein-based identification to where DNA testing was during the early days of development,” said chemist Brad Hart. “This method will be a game-changer, and while we've made a lot of progress toward improving it, there are steps to go before this new technique is able to reach its full potential.”
(1)What's the main purpose of the text?
A.To analyze crime scenes.
B.To distinguish different races.
C.To show the usefulness of DNA testing.
D.To introduce a new identification method.
(2)Which will be the most useful in identifying a person according to Brad Hart?
A.Chemical materials.
B.Protein in hair.
C.DNA variations.
D.Blood sample.
(3)What's the advantage of the protein-based identification over DNA testing?
A.Stability.
B.Popularity.
C.Security.
D.Convenience.
(4)What can be inferred from the last paragraph of the text?
A.DNA testing will soon reach its full potential.
B.Protein-based identification remains to be improved.
C.Protein-based identification has replaced DNA testing.
D.DNA testing develops as rapidly as protein-based identification.

【题目】根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
A major source of teen stress is school exams,and test anxiety is not uncommon.When you recognize your teen is under stress,how can parents help your teen stay calm before an exam?
Be involved.Parents need to be involved in their teen's work. What they look for is your presenceto talk,to cry,or simply to sit with them quietly.Communicate openly with your teen.Encourage your teen to express his/her worries and fears,but don't let them focus on those fears.
Help them get organized. Together,you and your teen can work out a timetable in which he/she can study for what he/she knows will be on the test.
Provide a calm setting.Help your teen set up a quiet place to study and protect his/her privacy.Give them a nutritious diet.It's important for your teen to eat a healthy,balanced diet during exam times to focus and do his/her best. If this happens,encourage your teen to eat light meals or sandwiches.A healthy diet,rather than junk food,is best for reducing stress.
Persuade your teenager to get some sleep and/or do something active when she needs a real break from studying.Making time for relaxation,fun,and exercise are all important in reducing stress.Help your teen balance her time so that she will feel comfortable taking time out from studying to spend time with friends or rest.
Show a positive attitude.Your panic,anxiety and blame contribute to your teen's pressure.Make your teen feel accepted and valued for his/her efforts.Most importantly,reassure your teen that things will be all right,no matter what the results are.
A.A parent's attitude will dictate their teen's emotions.
B.Exam stress can make some teens lose their appetite.
C.They will only make the situation worse.
D.Encourage your teen to relax.
E.The best thing is simply to listen.
F.Help your teen think about what he/she has to study and plan accordingly.
G.Your teen may also make negative comments about themselves.

【题目】根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Testing the five-second rule
You may have seen a friend drop food on the floor, pick it up, and eat it, while declaring, “Five-second rule! ” It's said that food dropped on the floor for five seconds or less is still likely to be clean. .
Students at Britain's Aston University, led by microbiology professor Anthony Hilton, tested the rule and found it to have some scientific basis. The study's results show that food dropped for five seconds is less likely to contain bacteria than if it sits there for longer, according to Hilton.
The students also found that the type of flooring where the dropped food lands has an effect. Bacteria are most likely to transfer from tiled (铺瓷砖的) surfaces to moist food when the food has stood there for more than five seconds.
Therefore, consumers should still be cautious. “However, the findings of this study will bring some light relief to those who have been employing the five-second rule for years, despite a general consensus that it is purely a myth,” professor Hilton said in a statement.
The research team at Aston also surveyed 500 people to find out who employs the five-second rule. Of the people surveyed, 87% said they would eat food dropped on the floor, or have done so in the past. “Our study showed people are also more likely to follow the five-second rule, which our research has shown to be much more than an old wives' tale,” Hilton says.
Still, scientists say you should be careful about eating food dropped on the floor, especially if you have doubts about the cleanliness of the surface.
A. But is that true?
B. Carpeted surfaces posed the lowest risk.
C. Of those people, the majority were women.
D. We've just lost our last excuse to eat food off the floor.
E. Usually people recover from the infection in five to ten days.
F. There is still a risk of infection if certain bacteria are present on the dropped surface.
G. A biologist points out that one in six Americans get sick from food poisoning every year.

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