1 . Blowing Up Balloons with CO₂

Chemical reactions (化学反应) make for some great experiments. You can make use of the CO₂(carbon dioxide) given off by a baking soda (小苏打) and lemon juice reaction to blow up your balloon!

What you’ll need:

●Balloon        ●About 40ml of water        ●Soft drink bottle

●Juice from a lemon          ●I teaspoon of baking soda

Instructions:

●Before you begin, make sure that you pull the balloon long to make it as easy as possible to blow up.

●Put the 40ml of water into the soft drink bottle.

●Add the baking soda and mix it with water.

●Put the lemon juice in and quickly put the balloon over the mouth of the bottle.

What’s happening?

If all goes well, then your balloon should inflate! Adding the lemon juice to the baking soda creates a chemical reaction and produces CO₂. The gas rises up and escapes (逸出) through the soft drink bottle. It doesn’t, however, escape the balloon, pushing it outwards and blowing it up.

1. Which of the following do you need for the experiment?

A．Two cups.	B．Apple juice.
C．250 ml water.	D．A teaspoon of baking soda.

2. What should you do before the experiment?

A．Heat the water.	B．Drink some juice.
C．Blow up the balloon.	D．Pull the balloon long.

3. What is the purpose of the text?

A．To describe an experiment.	B．To introduce a game.
C．To produce soft drinks.	D．To save some chemicals.

2 . 听下面一段独白，回答以下小题。
1. What is the speaker doing?

A．Hosting a radio program.

B．Chairing a meeting.

C．Conducting an interview.

2. In which country did blind boxes first become popular?

A．China.

B．Japan.

C．Thailand.

3. How much will the blind box market be worth by 2024?

A．1.14 billion yuan.

B．7.4 billion yuan.

C．30 billion yuan.

4. Why is Wang Ke fond of blind boxes?

A．To get a surprise.

B．To gain comfort.

C．To reduce stress.

3 . Colors can affect (影响) our feelings. Blue is a calm (冷静的) color. If you are feeling nervous (紧张), you can wear blue clothes or stay in a blue room. Blue is also the color of sadness. When someone says he’s feeling blue, he means he is sad.

White can also make you feel calm. So you can wear white too if you are nervous. And white often means a new beginning.

Green is the color of nature. It can give us more energy when we are feeling tired.

Some colors can make you feel warm. In cold areas, people usually use warm colors in their homes, like orange and yellow. Yellow is also the color of wisdom. Some people prefer this color when they study for exams. For example, they may use yellow school things.

Red is one of the strong colors. It often makes us feel active. But this color can also mean danger. So it is often used in stop signs (停车标志) and lights.

1. Which may be NOT good for you if you are nervous?

A．Wear white clothes.	B．Wear blue clothes.
C．Stay in a red room.	D．Stay in a blue room.

2. If you are sad, you can say “______”

A．I like blue.	B．I’m feeling white.
C．I like white.	D．I’m feeling blue.

3. What colors can make you feel warm?

A．Yellow and blue.	B．Yellow and orange.
C．White and green.	D．Blue and white.

4. The word “wisdom” means _____ in Chinese.

A．智慧

B．消极

C．愉快

D．正义

5. Which is TRUE?

A．White can make us feel tired.	B．Red is often used in stop signs.
C．Orange can mean danger sometimes.	D．Green symbolizes a new beginning.

4 . Ways to Improve Your Health

Sometimes it may seem difficult to improve our health. If so, the following health habits may help you.

●     1    

Research shows that eating a meal in the morning results in less body fat and less chance of overeating. Eating breakfast can help people feel better physically and mentally through the day.

●Get enough sleep.

Poor sleep can influence our memory and learning.       2     Studies show that people who don't get enough sleep seem to get into more accidents. So stay safe and get enough sleep!

●Take a walk every day.

    3       Instead of meeting friends for a meal, meet them for a walk. As you walk, you will see the beautiful world around you. Once you try, you will find that adding a walk into your daily life is very easy.

●Make social connections.

Social groups can provide support. They might include sport teams, art or music groups. The people in the group can offer advice and can help each other in difficult times. Also, being in a group keeps your mind busy.     4    

●Have a hobby.

A hobby could be running, reading or making something with your hands. Hobbies help people to relax and rest. Hobbies bring us joy.     5    

A．Get much exercise.

B．Eat breakfast every morning.

C．It can also cause traffic accidents!

D．An active mind is a healthy mind!

E．Spending time with others is very helpful.

F．Everyone could get a little more joy in their lives!

G．Walking is an easy way to add exercise to our lives.