2 . Let’s take a minute to think about the water we use. The human body is 60% water and we need to drink lots of water to be healthy. When we are thirsty we just go to the kitchen and fill a glass with clean water. We use water indirectly too. For example, farmers, who produce the food we eat, use water to make the plants grow.     1    

    2    , but this is not the case for many people around the world. Did you know that around 750 million people do not have clean water to drink? That’s around one in 10 people in the world.     3    Every year over 500,000 children die from diarrhoea (腹泻) from dirty water. That’s around 1,400 children every day! Also, in some countries children walk many kilometers every day to get water.    4    , they can’t go to school. Therefore, they don’t have time to learn how to read or write and don’t get an education.

In 1993 the United Nations decided that March 22nd is the World Day for Water. On this day every year, countries around the world hold events to educate people about the problems of dirty water and that clean water is something that everyone should have around the world.     5    . In this way, they know how it feels to walk a long distance carrying heavy bottles.

People give them money to do this and all the money helps get clean water to as many people as possible around the world.

A．When we turn on a light or switch on a TV or a computer we use energy and we need water to produce this energy

B．If it is such a long distance to get water for them

C．It is to inspire people to learn more about water-related problems

D．If we drink dirty water, we can catch diseases from the bacteria and become ill

E．The truth is that we are lucky enough to have clean water whenever we want

F．If children walk many hours a day to get water

G．At one school in the UK, children between the ages of 10 and 15 walk 6km with six liters of water

3 . Life can be challenging for teens. They must deal with schoolwork, family life and friends at the same time to fit. Feelings of sadness, frustration and irritability are common.     1     Their negative feelings don't come and go. Instead, those intense feelings can point to a disease called depression—one that may require treatment.

It's easy to think that depressed people simply feel sad or hopeless. For many teens that may be true.     2     Some kids withdraw from friends and family. Others respond with angry outbursts. Some teens may skip school or stop eating or sleeping. Teachers, parents or even a teen's close friends may find it hard to tell whether these behaviors are just part of being a teens or signs of something truly serious.

Even depressed teens may not realize they have this problem.     3     More than three million Americans between the ages of 12 and 17 experienced depression in 2019. However, a study by researchers at Harvard and Yale universities found that half of all teens with depression don't get help until they become adults. And only one in three will have been diagnosed by their doctor.

    4     "I can only work with what you give me," Dee says, the mental-health professional in Lincoln, Neb.

Dee says, peers should also seek for signs of depression. Keep an eye on your friends, she recommends. Watch for symptoms of isolation (孤立) or hopelessness.     5     Any of these behaviors could be a symptom of depression.

Overall, knowing who—and how—to help is essential for successfully treating depression in teens.

A．And the share of those affected is high.

B．Some may start abusing alcohol or drugs.

C．Teens should be honest with their answers.

D．The problem is that depression in teens can be hard to spot.

E．There is a link between mental illness and suicide in teens.

F．But for some teens, those emotions take a more extreme turn.

G．Even skipping classes can be a sign that something serious is going on.

4 . For many parents, raising a teenager is like fighting a long war, but years go by without any clear winner. Like a border conflict between neighboring countries, the parent-teen war is about boundaries: Where is the line between what I control and what you do?

Both sides want peace, but neither feels it has any power to stop the conflict. In part, this is because neither is willing to admit any responsibility for starting it. From the parents’ point of view, the only cause of their fight is their adolescents’ complete unreasonableness. And of course, the teens see it in exactly the same way, except oppositely. Both feel trapped.

In this article, I’ll describe three no-win situations that commonly arise between teens and parents and then suggest some ways out of the trap. The first no-win situation is quarrels over unimportant things. Examples include the color of the teen’s hair, the cleanliness of the bedroom, the preferred style of clothing, the child’s failure to eat a good breakfast before school, or his tendency to sleep until noon on the weekends. Second, blaming. The goal of a blaming battle is to make the other admit that his bad attitude is the reason why everything goes wrong. Third, needing to be right. It doesn’t matter what the topic is—politics, the laws of physics, or the proper way to break an egg—the point of these arguments is to prove that you are right and the other person is wrong, for both wish to be considered an authority—someone who actually knows something—and therefore to command respect. Unfortunately, as long as parents and teens continue to assume that they know more than the other, they’ll continue to fight these battles forever and never make any real progress.

1. Why does the author compare the parent-teen war to a border conflict?

A．Both are about where to draw the line.

B．Both can continue for generations.

C．Neither has any clear winner.

D．Neither can be put to an end.

2. What does the underlined part in Paragraph 2 mean?

A．The teens tend to have a full understanding of their parents.

B．The teens agree with their parents on the cause of the conflict.

C．The teens cause their parents of misleading them.

D．The teens blame their parents for starting the conflict.

3. Parents and teens want to be right because they want to ______.

A．give orders to the other

B．know more than the other

C．gain respect from the other

D．get the other to behave properly

4. What will the author most probably discuss in the paragraph that follows?

A．Solutions for the parent-teen problems.

B．Examples of the parent-teen war.

C．Causes for the parent-teen conflicts.

D．Future of the parent-teen relationship.