When the weather is hot, you go to a lake or an ocean. When you are near a lake or an Ocean, you feel cool. Why? The sun makes the earth hot, but it cannot make the water very hot. Although the air over the earth becomes hot, the air over the water is still cool. The hot air over the earth goes up. Then the cool air over the water moves in and takes the place of the hot air.

    Then you may ask, "Why is the ocean full of salt?" Scientists will say that the salt comes from the rocks. When the rocks get very hot or very cold, they crack (爆裂). Rain falls into the cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. And then you may doubt, "But the ocean does not get more salty every year. Scientists are not sure about the answer to this question.

    We know a lot about our world. But there are still many answers that we do not have, and we are curious about them.

    Where weredominoes (多米诺骨牌) from?Modern dominoes first showed up in Italy during the 18th century. But it isbelieved that the earliest dominoes were Chinese playing cards. Italianmissionaries (传教士) in China may have brought the gameto Europe. Do you think so?

    Do youlike to play with dominoes? Dominoes are small rectangular (长方形的) pieces made of wood orplastic (塑料). People can place dominoes in differentshapes. Then, they push one domino down and the rest of the dominoes fall oneby one. It is interesting to watch.

    Butplacing dominoes is hard. To make sure the dominoes fall smoothly, the spacebetween each domino is important. According to domino—play. com, if a domino is about 4cm long, then the space between two dominoes should be1—2 cm. If the space is too big, the dominoes will stop falling halfway.If the space is too small, the dominoes will fall too quickly and won't lookinteresting.

    Beginnerscan start by putting dominoes in a straight line. This is the easiest shape.Professional (专业的) playerscan place dominoes in many other shapes, including big circles, beautifulflowers and even famous paintings.

Everyone gets angry. Many things may make you angry. Maybe your teacher gave you too much homework. Or maybe a friend borrowed your favourite video game and then broke it. You may get angry when something doesn't go your way. Maybe you get mad at yourself when your team loses an important game. Or maybe you fly into a rage(暴怒) when a driver accidentally cuts in front of you. That makes you angry!

You need to know how to deal with(处理)your anger. Here are some things you can do when you feel angry:

Talk to a friend you can trust.

Count to 

10.

Get or give a hug.

Take some exercise.

Draw a picture of your anger.

Play a video game.

Run around the outside of the house five

times as fast as you can.

Sing along with the CD player.

Take out the weeds(杂草) in the garden.

Think good thoughts (maybe about a fun

vacation or your favourite sport).

Take a bike ride, go skating or play basketball — do something active!

Never getting angry is impossible. But when you're angry, you can do something and it can make things better. Don't let anger be the boss of you. Take charge of it!

You're chatting with a friend and want to suggest a good book. All of a sudden, you can't remember the title! The harder you try to remember, . the more it eludes (使不记得) you. We've all been there, and everyone knows how hard it is to remember all the information in your head. {#blank#}1{#/blank#}

● Repeat important information out loud. {#blank#}2{#/blank#} When you repeat something out loud, you aren't technically memorizing it. You're actually creating a pattern (方式) and sound that will make the information easier to remember in the future.

● {#blank#}3{#/blank#} Turn the TV off while you study and put down the phone while you're driving. When you do different activities at the same time, your attention is divided, which will make it hard to process (处理) the information necessary to remember what you're doing.

● Take notes and write things down. Taking notes will help you memorize the information, even if you never look at your notes again! {#blank#}4{#/blank#} So you'd better use pens and paper if you really want to remember your friend's birthday or an important meeting.

● Take a short walk. Studies show that taking a walk will increase your memory. If you're trying to remember something, spend a few minutes walking around your neighborhood to see if it helps. {#blank#}5{#/blank#}At best, you'll remember the name of that life-changing book from primary school!

Today, we are going to make a simple cake. Here are the materials (材料) and ways. Let's have a try!

Materials

□ 1 cup of white sugar

□ 1/2 cup of butter

□ 2 eggs

□ 2 spoons of vanilla extract (香草香精)

□ 1 and 1/2 cups of flour (面粉)

□ 1 and 3/4 spoons of baking powder (发酵粉)

□ 1/2 cup of milk

Ways

◆First, you should preheat (预热) your oven (烤箱). Then you should cover a pan (平底锅) with oil and flour.

◆You should mix up the sugar and butter in a medium bowl. Then you can add the eggs, one  at a time. Next, you can add the vanilla extract, flour and baking powder to it and mix well. Finally, you should add the milk. Then pour it into the prepared pan.

◆Bake for 30 to 40 minutes in the oven. If you want to make cupcakes, you can bake for 20 to 25 minutes.

How do you go to work? Ride a bike? Take a bus? Take a car? Swim across river? In the city of Xishan, the Bingjiang river has become a famous swimming place, because some people swim along with their own things in the river to go to work.

To get from point A to point B, people in Xishan don't just swim with their clothes on, but instead pack (打包) their own things into the special bag. This bag will keep everything dry until they reach their destinations (目的地).

"I use 5 minutes walking from my home to the river. And I only use 10 minutes to swim across the river and 5 minutes to walk to my office. I have a special swim bag which I can put all my things in. But I used one hour to go to work by bus before." Li Hua, a local says.

The traditional traffic tools like cars and buses not only cause heavy traffic but also produce too much pollution in our daily life. Maybe it's time for us to change our ways to go to work.