30. The underlined word “prey” in Paragraph 5 probably means ____.
A. an animal that is too lazy B. an animal that likes hiding games C. an animal that keeps itself clean D. an animal that is hunted 31. This article is mainly written to _________. A. explore the reasons behind cats’ strange behavior B. describe cats’ past wild experience to readers C. tell cat owners how to make life easier for cats
D. compare cats’ behavior in human homes with that in the wild
D
Teenagers who check social media for several hours a day are at the risk of developing ADHD (多动症), a study has concluded.
The research team, from the University of Southern California, tracked 2,600 teenagers aged 15 and 16. They asked them how many times they checked their phones and other digital devices for various reasons, and then monitored them for symptoms of ADHD. After two years, those who had checked their phones the most often were twice as likely as those who checked the least often to show signs of ADHD．
Writing in the JAMA medical journal, the scientists said, “Modern media devices immediately inform users when new text messages, social media postings, or video game play invitations arrive. Exposure to such information may draw attention away from important tasks. Frequent distraction could interrupt the development of constant attention and organization skills.”
They believe constant access to instant entertainment also has an impact. Researcher Professor Adam Leventhal said all previous research had focused on the link between ADHD and televisions. “What’s new is that previous studies on this
topic were done many years ago, when social media, mobile phones, tablets and mobile apps didn’t exist. We can say with confidence that teens who are exposed to higher levels of digital media are significantly more likely to develop ADHD symptoms in the future,” he said.
Leventhal believes the findings help fill a gap in understanding how new mobile media devices and seemingly limitless content pose a mental health risk for children. And the findings serve as a warning.
British scientists welcomed the findings. But Professor Andy Przybylski of the Oxford Internet Institute said, “The study relies on survey responses provided by the students in question. It is not clear if teachers or parents would rate the children similarly or if the self-reported measure of digital screen use is related with either actual behavior or higher quality survey items.” 32. How did the researchers conduct the study? A. By monitoring 2,600 teenagers with ADHD．
B. By controlling different teens’ time spent on social media. C. By tracking the participants for two years.
D. By analyzing data from previous researches online.
33. What does Leventhal think of the exposure to higher levels of digital media? A. It will cause diverse ADHD symptoms. B. It will create higher ADHD risks. C. It will weaken teenagers’ confidence.
D. It will have a major influence on organization skills. 34. What does Professor Andy Przybylski think of the study? A. It provides a better understanding of the media. B. It should have focused on parents’ responses.
C. Its findings are not reliable enough. D. It’s a breakthrough in this field.
35. What can be a suitable title for the text? A. The use of digital media is on the rise
B. Teens’ exposure to modern media calls more attention C. Heavy use of social media may increase Teens’ ADHD risks D. Teens are increasingly exposed to ADHD 第二节 （共5小题；每小题2分，满分10分）
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。
There is no such thing as a “bad memory”, and everyone can improve their memory, as long as you are not suffering from memory loss as a medical condition. 36
Stop thinking that you have a “bad memory”. Convince yourself that you do have a good memory that will improve. Too many people get stuck here and convince themselves their memory is bad, that they are just not good with names and that numbers just slip out of their minds for some reason. 37
Use association to remember facts. 38 For example, if you have a hard time remembering that JFK was the president involved in the Bay of Pigs Invasion, just picture the handsome president swimming in an ocean surrounded by happy, oinking pigs.
Involve multiple senses. You can stimulate(刺激) more parts of your brain by using as many senses as possible when memorizing information. 39 For example, the process of writing information by hand stimulates your brain and makes it easier to remember the information later.
40 By developing new mental skills- especially complex ones such as learning a new language or learning to play a new musical instrument- and
challenging your brain with puzzles and games, you can keep your brain active and improve its physiological function. A. Exercise your brain as often as possible. B. Give yourself some time to form a memory.
C. Erase those thoughts and promise to improve your memory.
D. If you want to improve your memory, there are a number of things you can do. E. You can create an image in your mind to help you remember a word or an image. F. This concrete image in your mind will help you link the president with this event. G. When a larger part of your brain is active, your ability to arouse your memory will increase.
第三部分 语言知识运用（共两节，满分45分） 第一节（共20小题；每小题1.5分，满分30分）
阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。
I was working as a lifeguard at Tower 15 on Newport and two blocks to my right was another guard named Mike, working at Tower 17. He called me over the phone and said, “Hey, I have 41 two kids who are swimming in the dangerous zone. I have to give them a warning. Keep an eye on us.” I said “Sure.” In case of 42 , anytime we got out of our tower, we were supposed to 43 somebody else.
Mike hung up the phone and 44 the lifebuoy(救生圈). Then he realized that these two kids had been 45 and that there was a great tendency for them to be 46 by the wave. 47 , Mike rushed toward the ocean. I 48 the water and all I found was two small heads. The mother of the two kids knelt(跪) down on the beach with 49 .
When I dropped my binoculars(望远镜) and reached the mother, Mike was in
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