2024年中考英语（阅读还原）模拟真题速递(深圳专用)（含解析）

阅读还原10篇
（2024·广东深圳·二模）What time is it The answer you give can be different, because you are in different Earth’s time zones (时区). 1
Scientists are now thinking of creating a lunar (月球的) time zone. 2 At the moment, astronauts are using time zones of their own countries. But there could be safety problems caused by the differences in time-telling.
Setting up a lunar time zone is not easy. 3 Since gravity is weaker in the Moon, clocks run a bit faster there. After 24 hours, a lunar clock would be 56 microseconds ahead of a clock on the Earth. Another point to consider is that a full day on the Earth is about 24 hours between two sunsets. 4 This means that lunar nights can be around two weeks long. With all this to think about, scientists need to decide whether it would be better to follow a time zone on the Earth, or for the Moon to have its own special zone.
5 For example, who should be responsible for keeping the time zone going And how can it be made practical for astronauts to use
There are more countries planning Moon trips in the future. The idea of creating a time zone on the Moon would make these easier.
A．Scientists must consider other problems too.
B．It is difficult for astronauts to live on the Moon.
C．Gravity influences how quickly or slowly time passes.
D．But how could you tell the time if you aren’t anywhere on the Earth
E．While on the Moon, it is nearly 709 hours, about 29.5 Earth days.
F．They believe it would be better for astronauts to communicate by using Moon Time.
（2024·广东深圳·二模）阅读下面短文，并从方框里的六个句子中选择五个还原到原文中，使原文的意思完整、连贯。
Do you want to make your learning more effective Follow these four steps to develop your own personal learning plan and work to achieve your goals. Find a learning goal
Find your goal before you create a personal learning plan. 6 It should also be important enough that you’ll focus on it over other things. Break your goal into smaller goals
7 Think of these smaller goals as the steps you need to take to achieve your final goal. By breaking your
goal into smaller goals, it’ll be clear what you need to learn and how to get there. Develop your plan
Make a complete plan after finding your overall goal and smaller goals. Organize your plan in an order and list each of your learning goals. And then you should decide the actions you need to take to reach them. 8 Hold yourself accountable (对自己负责)
9 It’s important that you hold yourself accountable and follow through on the leaning activities you’ve planned. Learning new skills can take time, but you have to put in the necessary time to meet your goals. 10 If you waste too much time, you may not achieve your final goal on time.
A．And do not forget the date by which you would like to complete each action.
B．Try to save time to focus on your learning each week.
C．Your goal should be challenging and possible.
D．You have a very big goal.
E．Your work has just begun after you’ve created a learning plan.
F．It will be easier to reach if you break your final goal down into smaller ones.
（23-24九年级下·广东深圳·阶段练习）阅读以下短文, 并从下列的六个句子中选择五个还原到原文中, 使原文的意思完整、连贯。
Riding a bike can be great fun for you, and it’s a good way to keep fit. However, bike riding is also dangerous, especially when you’re sharing the road with motorized (机动车的) traffic. 11
Do not use your mobile phone while cycling
You should not use mobile phone while riding bikes because it can take the rider’s attention away from the road and people around you. 12 In addition, using a mobile phone while cycling may be illegal. People will be fined because of their behaviours.
Do not change your direction suddenly
13 Always look carefully before you start, stop or turn. You need to let drivers know you have seen them. Otherwise, it may cause collision (碰撞) with cars.
Make sure your bike is safe
Is your bike checked from time to time If not, why not Brakes (刹车) must work well in all situations: dry and wet. 14 This benefits the rider and other road users.
Follow traffic laws
Traffic laws apply to you as a cyclist, as well as other road users. 15 You must stop for red lights
and avoid riding in motor ways. By obeying these rules, riders can keep themselves and others safe on the road.
A．So cyclists should follow traffic rules.
B．Are the tyres in good condition to protect the safety of your trip
C．Here are some suggestions on how to keep safe.
D．Show drivers what you plan to do in plenty of time.
E．Ride across pedestrian crossings, unless you are allowed to.
F．It can increase the risk of accidents.
（2024·广东深圳·二模）请阅读短文，并从下列的六个句子中选择五个还原到原文中，使原文的意思完整、连贯，并在答题卡上将相应的字母编号涂黑。
When do you love to exercise Do you often exercise just before going to bed 16 However, researchers from Concordia University in Canada wanted to find out if the time you exercise could affect how well you sleep.
They conducted a study and found that taking part in high-intensity (高强度的) exercise less than two hours before you go to bed may negatively affect how well you sleep. 17 In the study, the researchers collected data from a total of 194 people. They recorded whether people exercised during the early or late evening. 18 In addition, the researchers recorded how healthy the participants were, how long they spent exercising and how intense their exercise was.
19 For example, the participants who exercised too close to the bed time took longer to go to sleep, and slept for a shorter amount of time.
What’s more, the study also found that taking part in high-intensity exercise for between 30 and 60 minutes over two hours before bed helped people fall asleep sooner and sleep better. Cycling was found to be the best exercise to help with sleep. 20
A．It was found that when exercise ended less than two hours before bed, people slept worse.
B．Should you take part in exercise when you are tired
C．They also recorded when they ended their exercise before going to bed.
D．It was also best to exercise at the same time each day.
E．Exercise is known to improve sleep in most cases.
F．The study was published in Sleep Medicine Reviews.
（2024·广东深圳·一模）请阅读下面的短文，并从文后六个选项中选择五个还原到原文中，使原文的意思完整、连贯。
With bright lights, decorations and festive parties, holiday seasons can be magical. 21 Discomfort with relatives and changes in routine (常规) may cause them worry and loneliness. Here’s how to support your teen through holiday stress.
Having a Conversation
During holidays and events, keep the lines of communication open. Talk to your teens about possible stressors they may face during gatherings and come up with ideas to deal with them. 22
Setting Boundaries (界限)
There may be gatherings or parties your teens would prefer not to attend. 23 Additionally, help them with polite excuses that allow them to escape from conversations, such as saying “Excuse me, I need to check on something.” This will enable them to handle social situations with confidence and comfort.
Keeping a Routine
Encourage your teen to stick to regular sleep and meal habits. 24 Limiting screen time will also help teens manage their stress.
Spending Positive Time Together
25 They could be anything like playing games, watching movies, or volunteering together. By joining in these feel-good activities as a family, your teen will feel the positive influence even more.
A．Then give them both space and support.
B．But for teens, they can be just the opposite.
C．Take part in activities that are fun, meaningful, or both.
D．So remind them it’s okay to say, “No, thanks” if they’re uncomfortable.
E．This can help them feel more prepared and in control of their experience.
F．Besides, help them plan a holiday with time for hobbies, exercise and housework.
（2024·广东深圳·一模）阅读下面的短文，并从下列的六个句子中选择五个还原到原文中，使原文的意思完整、连贯。
A smile shows that a person is happy. For example, a person may smile when he or she is pleased with a grade on a test. Or a person might smile if a friend tells a funny joke. People smile for many different reasons. But smiles are more than just a way for people to show that they are happy. 26
First, it is easier to smile than to show unhappiness. In fact, it only takes 17 muscles (肌肉) to smile. On the other hand, it takes 43 muscles to show unhappiness. 27
Second, smiles are nice. People may try to look nice on the outside by exercising or wearing nice clothes. 28 That is because it is easy to be around someone who is smiling and happy.
Third, smiles have power. Both smiling and laughing can easily and quickly spread from one person to another. If one person smiles, people around him or her want to smile, too. Similarly, when a person laughs, people will be likely to laugh with him or her. 29 It is the easiest and cheapest way to cheer someone up.
Finally, smiling and laughing are very good for the body. 30 You’ll find that it will be hard to stay mad or sad for very long.
A．No one likes people who never smile.
B．Even if you are mad or sad, try smiling.
C．There are other good reasons for smiling often.
D．So give the muscles in your face a rest and smile!
E．If a person is sad, the best thing to do is to share a smile or laugh.
F．However, there is a famous saying: A smile is the best thing a person can wear.
（2024·深圳·阶段练习）阅读短文, 从下面所给的选项中选出能填入空白处的最佳选项, 使短文通顺、连贯。选项中有一项为多余选项。
In high schools, as subjects increase, maybe you can’t fully understand what you are learning. 31 This process is called self-reflection (反省).
Self-reflection begins with slowing down and calming yourself, including calming your mind. Then you can give your brain a chance to think about what it has already received. Some people prefer to do self-reflection only in their minds. 32 Either of the methods works. It depends on your own personal learning ability.
How do you learn to do self-reflection 33 First, choose a proper time to do it. Every night before going to bed, you can do self-reflection over what you have learned in the daytime. When you complete a unit of study, you can do self-reflection by drawing a mind map. Secondly, find a quiet place and take out your reflection diary. Write down some notes on the new things that you have just learned. And connect them with the previous (以前的) knowledge. As a result, you can understand them better. 34 This will help you remember to look for answers when you are working on the same topic next time.
35 If you have never taken the time to do it, try it now!
A．Others tend (倾向) to keep diaries or take notes.
B．You can take the following steps.
C．So it is necessary to stop yourself to think about what you have been learning.
D．At last, think about the questions you are not sure of and write them down.
E．Self-reflection works at the proper time.
F．Successful students always know self-reflection is important.
（23-24九年级下·广东深圳·阶段练习）以下是一篇短文。请阅读全文并从下面六个句子中选择五个还原到原文中，使原文的意思完整、连贯。
Today, a kind of animal is an endangered species (物种). This means there are very few animals of that kind left on Earth. The animals could face extinction. 36 When a type of animal is extinct, it is gone forever.
One problem for animals is that their living places are sometimes destroyed by humans. As human populations increase, more and more space is needed. Building houses for people to live in forces animals to leave their natural homes. Trees are cut down to make room for homes and businesses. Swamps (沼泽) are filled in so that neighborhoods can expand (扩展). The living places are destroyed. The animals have nowhere else to go. 37
Humans must stop the extinction of animals because of the loss of their living places. We have to learn more about animal populations when considering building things. Other choices may not be so convenient.
38 Better planning can make a difference. It is still possible to keep so many kinds of animals for future children to enjoy.
Another major problem is overhunting by humans. 39 The governments of countries around the world must agree on laws about protecting animals. Some animals may have large enough populations so hunting will not put them in danger. Others must be protected.
40 Some organizations are working hard to create living places for them. Breeding (繁殖) programs are helping animal populations increase. We all have to know the problem and think before we act. The things we do can have an effect on more than just ourselves.
A．This is a worldwide problem.
B．Extinction is when all the animals of that kind die.
C．However, they can be helpful to the lovely animals.
D．It is important for animals to have enough food to eat.
E．There is still hope for animals on the endangered species list.
F．Without a living place, the number of animals begins to go down.
（23-24九年级上·广东深圳·期中）第二节 以下是一则短文，请阅读全文，并从下列的六个句子中选择五个还原到原文中，使原文的意思完整、连贯，并在答题卡上将相应的字母编号涂黑。
For most students, writing clearly and persuasively（有说服力地）is a challenge. 41 However, few fill their essays（文章）with necessary information.
How a personal statement is used.
42 These are pieces of writing that put your life at the center. It’s better to describe a single life experience or memory than to try to talk about your whole life story.
Be unique（独特的）.
43 One way to be unique is to avoid the most popular Common Application essay question, which asks you to talk about an experience you have had and how it had an influence on you. There are six questions to choose from, and you have to choose one of them to write about. 44
Stay true to your voice.
45 If your friends, family and teachers would describe you as outgoing or relaxed, or quiet and thoughtful, then try to reflect（反映）that in your writing.
A．Be brave when making your choice.
B．The essays that truly stand out are personal.
C．Many can use the correct grammar and words.
D．They have trouble coming up with helpful information.
E．The language, style and spirit of your essays should reflect your personality.
F．A great personal statement shouldn’t just tell a good story but should also be unique.
（23-24九年级上·广东深圳·期中）请阅读全文，从下列六个句子中选择五个还原到原文中，使原文意思完整、连贯。
Do you ever find yourself getting really unhappy for almost no reason Or suddenly feeling down without knowing why 46
An important cause for mood（情绪）changes is biology. When puberty（青春期）begins, the body starts producing hormones （荷尔蒙）. These hormones cause physical changes in the body. 47
Here are some things you can do that might make those bad moods a bit easier to deal with.
48 Although not every teen experiences mood changes to the some degree, they are common.
Talk to people you trust. Friends can help each other by realizing that they are not alone in their feelings. Talking to parents is important, too. Parents can share their own experiences dealing with bad moods. 49 And a doctor can help to answer questions about development.
Get enough sleep. Though it can be hard to find enough time, getting enough rest is very important. 50
Create. Taking part in some kinds of activities like building something out of wood or starting an art of music piece. Writing can help you organize and express your thoughts and feelings. Get your thoughts on paper. Do the same thing with paint, music or other art forms. Put your feelings into your art work.
A．But at the same time, they also seem to cause mood changes.
B．Taking part in some kinds of activities.
C．Remember you’re not alone.
D．Teachers are often good resources.
E．But why is the feeling so common among teens
F．Being tired can lead to more sadness.
参考答案：
1．D 2．F 3．C 4．E 5．A
【导语】本文主要介绍了科学家们正在考虑建立一个月球时区。
1．根据“The answer you give can be different, because you are in different Earth’s time zones”可知你给出的答案可能不同，因为你处于不同的地球时区，结合下文可知，此处引出不在地球如何报时，选项D“但是，如果你不在地球上的任何地方，你怎么能说出时间呢”符合语境。故选D。
2．根据“Scientists are now thinking of creating a lunar (月球的) time zone”可知科学家们现在正在考虑建立一个月球时区，选项F“他们认为宇航员利用月球时间进行交流会更好”符合语境。故选F。
3．根据“Setting up a lunar time zone is not easy”可知建立月球时区并不容易，此处介绍原因，选项C“重力会影响时间流逝的速度快慢”符合语境。故选C。
4．根据“This means that lunar nights can be around two weeks long”可知此处介绍月球时区的时间，选项E“在月球上，它将近709小时，大约29.5地球日”符合语境。故选E。
5．根据“For example, who should be responsible for keeping the time zone going And how can it be made practical for astronauts to use ”可知此处介绍了一些问题，选项A“科学家们也必须考虑其他问题”符合语境。故选A。
6．C 7．F 8．A 9．E 10．B
【导语】本文是一篇说明文。文章主要介绍了如何制定个人学习计划并实现目标的步骤。
6．根据上文“Find your goal before you create a personal learning plan.”和下文“It should also be important enough that you’ll focus on it over other things.”可知，此处应介绍学习目标应具有的特点；选项C“你的目标应该是具有挑战性和可能性。”符合语境。故选C。
7．根据下文“Think of these smaller goals as the steps you need to take to achieve your final goal.”可知，此处是指把最终目标分解成小目标；选项F“如果你把你的最终目标分解成小目标，它会更容易实现。”符合语境。故选F。
8．根据上文“And then you should decide the actions you need to take to reach them.”可知，此处是指也要安排好完成每一个行动的时间；选项A“也不要忘记你想完成每一个行动的日期。”符合语境。故选A。
9．根据下文“It’s important that you hold yourself accountable and follow through on the leaning activities you’ve planned.”可知，此处是指，学习计划制定后，学习活动才开始，你要对自己负责，并坚持完成你计划的学习活动；选项E“制定学习计划后，你的工作才刚刚开始。”符合语境。故选E。
10．根据下文“If you waste too much time, you may not achieve your final goal on time.”可知，此处是指要节省时间来专注学习；选项B“试着节省时间来专注于你每周的学习。”符合语境。故选B。
11．C 12．F 13．D 14．B 15．A
【导语】本文介绍保持安全的一些建议。
11．根据“However, bike riding is also dangerous, especially when you’re sharing the road with motorized (机动车的) traffic.”和下文的四个小标题可知本文在介绍保持安全的一些建议。选项C“以下是有关如何保持安全的一些建议。”符合语境。故选C。
12．根据上文“You should not use mobile phone while riding bikes because it can take the rider’s attention away from the road and people around you.”可知，骑车时使用手机是很危险的。选项F“它会增加发生事故的风险。”符合语境。故选F。
13．根据“You need to let drivers know you have seen them. Otherwise, it may cause collision (碰撞) with cars.”可知，此处谈到在马路上骑车时要让汽车司机看得见你。选项D“让司机在充足的时间内看到你打算做什么。”符合语境。故选D。
14．根据上文“Is your bike checked from time to time ”可知此处谈到自行车要定期检查。选项B“轮胎状况是否良好，能保障您的安全出行？”符合语境。故选B。
15．根据上文“Traffic laws apply to you as a cyclist, as well as other road users.”可知，交通规则同样适用于骑自行车的人。选项A“所以骑自行车的人应该遵守交通规则。”符合语境。故选A。
16．E 17．F 18．C 19．A 20．D
【导语】本文是一篇说明文。主要介绍了锻炼时间和睡眠质量之间的关系。
16．根据“However, researchers from Concordia University in Canada wanted to find out if the time you exercise could affect how well you sleep.”可知，研究人员想要弄清楚锻炼的时间是否会影响睡眠质量，E项“众所周知，在大多数情况下，锻炼可以改善睡眠。”符合语境。故选E。
17．根据“They conducted a study and found that taking part in high-intensity exercise less than two hours before you go to bed may negatively affect how well you sleep.”和“In the study, the researchers collected data from a total of 194 people.”可知，研究人员公布了一项研究，F项“这项研究发表在《睡眠医学评论》上。”符合语境。故选F。
18．根据“They recorded whether people exercised during the early or late evening.”和“In addition, the researchers recorded how healthy the participants were, how long they spent exercising and how intense their exercise was.”可知，此处说的是研究人员在研究中所记录的内容，C项“他们还记录了他们在睡觉前结束锻炼的时间。”符合语境。故选C。
19．根据“For example, the participants who exercised too close to the bed time took longer to go to sleep, and slept for a shorter amount of time.”可知，临近就寝时间进行锻炼对睡眠时间有负面影响，A项“研究发现，当运动在睡前两小时内结束时，人们睡得更差。”符合语境。故选A。
20．根据“What’s more, the study also found that taking part in high-intensity exercise for between 30 and 60 minutes over two hours before bed helped people fall asleep sooner and sleep better. Cycling was found to be the best exercise to help with sleep.”可知，此处说的是对睡眠有正面影响的行为，D项“每天在同一时间锻炼也是最好的。”符合语境。故选D。
21．B 22．E 23．D 24．F 25．C
【导语】本文介绍了如何帮助青少年应对节日压力。
21．根据“Discomfort with relatives and changes in routine (常规) may cause them worry and loneliness.”可知，此空要引出“青少年的不适”，B选项“但对于青少年来说，情况可能恰恰相反。”符合，故选B。
22．根据“Talk to your teens about possible stressors they may face during gatherings and come up with ideas to deal with them.”可知，上文讲了“提前告知可能的压力及如何处理”，此空讲之后发生的事，E选项“这可以帮助他们做好更充分的准备并控制自己的体验。”符合情境。故选E。
23．根据“There may be gatherings or parties your teens would prefer not to attend.”及“Additionally, help them with polite excuses that allow them to escape from conversations”可知，此处与“拒绝不想去的聚会”有关，D选项“所以提醒他们，如果他们不舒服，可以说‘不，谢谢’。”符合，故选D。
24．根据“Keeping a Routine”及“Encourage your teen to stick to regular sleep and meal habits.”可知，此处与“保持规律”及“日常活动”有关，F选项“此外，帮助他们计划一个假期，有时间进行爱好、锻炼和做家务。”符合，故选F。
25．根据“Spending Positive Time Together”及“They could be anything like playing games, watching movies, or volunteering together.”可知，此处与“与青少年共度美好时光”及“活动”有关，C选项“参加有趣、有意义或两者兼具的活动。”符合，故选C。
26．C 27．D 28．F 29．E 30．B
【导语】本文介绍了微笑的好处和原因。
26．根据“First, it is easier to smile than to show unhappiness.”可知，下文介绍微笑的理由。C选项“经常微笑还有其他的好理由。”符合语境。故选C。
27．根据“In fact, it only takes 17 muscles (肌肉) to smile. On the other hand, it takes 43 muscles to show unhappiness.”可知，此处介绍微笑和不高兴动用的肌肉数量，此空应说明微笑对肌肉的好处。D选项”所以，让你脸上的肌肉休息一下，微笑吧！”符合语境。故选D。
28．根据“People may try to look nice on the outside by exercising or wearing nice clothes. ... That is because it is easy to be around someone who is smiling and happy.”可知，微笑比穿着漂亮的衣服更让人美丽，F选项“然而，有一句名言：微笑是一个人能穿的最好的东西。”符合语境。故选F。
29．根据“It is the easiest and cheapest way to cheer someone up.”可知，此处与让别人振作有关，E选项“如果一个人悲伤，最好的办法就是分享一个微笑或大笑。”符合语境。故选E。
30．根据“You’ll find that it will be hard to stay mad or sad for very long.”可知，此处与疯狂和悲伤的情绪有关，B选项“即使你生气或伤心，试着微笑。”符合语境。故选B。
31．C 32．A 33．B 34．D 35．F
【导语】本文主要介绍了如何学会自我反省。
31．根据下文“This process is called self-reflection (反省).”可知，此处是在介绍什么叫反省，选项C“所以有必要让自己停下来思考一下你所学的东西。”符合语境 。故选C。
32．根据上文“Some people prefer to do self-reflection only in their minds.”以及下文“Either of the methods works.”可知，此处应是在介绍另一些人更倾向于怎么做，选项A“其他人倾向于记日记或做笔记。”符合语境。故选A。
33．根据上文“How do you learn to do self-reflection ”以及下文“First, … Secondly, …”可知，此处起到承上启下的作用，选项B“你可以采取以下步骤。”符合语境。故选B。
34．根据上文“First, … Secondly, …”可知，此处应是最后一个步骤，选项D“最后，想想你不确定的问题，并把它们写下来。”符合语境。故选D。
35．根据上文可知，下一句“If you have never taken the time to do it, try it now!”中的it指的是“自我反省”，而且作者既然号召读者尝试一下，那么此处应是在说自我反省的好处，选项F“成功的学生总是知道自我反省的重要性。”符合语境。故选F。
36．B 37．F 38．C 39．A 40．E
【导语】本文主要讲述了动物正面临着灭绝的风险以及人类应该采取的措施。
36．根据“The animals could face extinction.”可知，讲述什么是灭绝，选项B“灭绝是指那种动物全部死亡。”符合语境，故选B。
37．根据“The animals have nowhere else to go.”可知，本段主要讲述了动物没有了生存空间，选项F“没有了生存的地方，动物的数量开始减少。”符合语境，故选F。
38．根据“Other choices may not be so convenient.”和“Better planning can make a difference. It is still possible to keep so many kinds of animals for future children to enjoy.”可知，人类能够帮助动物，选项C“然而，他们可以帮助可爱的动物。”符合语境，故选C。
39．根据“Another major problem is overhunting by humans.”可知，讲述过度捕猎是一个全球性问题，因此需要全世界政府的帮助，选项A“这是一个世界性的问题。”符合语境，故选A。
40．根据“Some organizations are working hard to create living places for them.”可知，讲述一些机构为动物所作的努力，选项E“濒危物种名单上的动物仍然有希望。”符合语境，故选E。
41．C 42．B 43．F 44．A 45．E
【导语】本文是一篇说明文。文章主要讲述了写个人陈述时需要勇敢做出选择，突出个人特色。
41．根据空后的“However, few fill their essays（文章）with necessary information.”可知，此处说的是大多数人的做法，选项C“许多人可以使用正确的语法和单词。”符合语境。故选C。
42．根据“How a personal statement is used.”以及空后的“These are pieces of writing that put your life at the center. ”可知，此处与个人有关，选项B“真正突出的文章都是针对个人的。”符合
语境。故选B。
43．根据“Be unique”以及“One way to be unique is to avoid the most popular Common Application essay question, which asks you to talk about an experience you have had and how it had an influence on you.”可知，此处与独特性有关，选项F“一个好的个人陈述不仅应该讲述一个好故事，而且应该是独一无二的。”符合语境。故选F。
44．根据空前的“There are six questions to choose from, and you have to choose one of them to write about.”可知，此处与选择这六个问题有关，选项A“做出选择时要勇敢。”符合语境。故选A。
45．根据空后的“If your friends, family and teachers would describe you as outgoing or relaxed, or quiet and thoughtful, then try to reflect（反映）that in your writing.”可知，此处与个性有关，选项E“你文章的语言、风格和精神应该反映你的个性。”符合语境。故选E。
46．E 47．A 48．C 49．D 50．F
【导语】本文主要讲述了当青春期开始的时候，身体分泌荷尔蒙，这些激素引起了青少年身体以及情绪的变化，以及对如何调整自己的情绪提出了几点建议。
46．根据上文“Do you ever find yourself getting really unhappy for almost no reason Or suddenly feeling down without knowing why ”可知，你有没有发现自己无缘无故地变得很不开心？或者突然情绪低落而不知道为什么？这是在说自己无缘无故情绪变化的这种现象。选项E“但为什么这种感觉在青少年中如此普遍呢？”符合语境。故选E。
47．根据前一句“These hormones cause physical changes in the body.”可知，这些激素会引起身体的生理变化。这是在说激素对身体生理的作用。选项A“但与此同时，它们似乎也会引起情绪变化。”符合语境。故选A。
48．根据后文“Although not every teen experiences mood changes to the some degree, they are common.”可知，尽管并不是每个青少年都会经历某种程度的情绪变化，它们很常见。这是在说，情绪变化是很常见的现象。选项C“请记得你并不孤单”符合语境。故选C。
49．根据前文“Talk to people you trust. Friends can help each other by realizing that they are not alone in their feelings. Talking to parents is important, too. Parents can share their own experiences dealing with bad moods.”可知，与你信任的人交谈。朋友们可以通过意识到他们在他们的感情中并不孤单来互相帮助。与父母交谈也很重要。父母可以分享他们自己处理坏情绪的经验。这是在说要与信任的人交谈。选项D“教师往往是很好的资源。”符合语境。故
选D。
50．根据上文“Though it can be hard to find enough time, getting enough rest is very important.”可知，虽然很难找到足够的时间，但得到足够的休息是非常重要的。这是在说休息的重要性。选项F“疲劳会导致更多的悲伤。”符合语境。故选F。