【推荐2】One day, you open the fridge and find some mold (发霉的) food. But before you throw it away, your mother stops you. She doesn’t want to waste (浪费) food. She cuts off the molds part and eats the rest. Is it safe to do this?

Mold can grow on almost all kinds of food. It is usually green, white, black or gray. Mold makes food soft and changes its color. Mold food tastes quite bad, and it’s not safe to eat.

If you find mold in soft food, just throw it away. Soft food, such as bread, tomatoes or hot dogs, usually contains water. This allows mold to easily grow. Bacteria (细菌) can also grow along with it.

But it’s easy to remove mold from hard food. The mold can’t grow very deep in this kind of food. You should cut about 2.5 cm around and below the mold to remove it. It’s OK to cut the mold parts out of hard food and eat the rest. But if the food is covered with mold all over, you should still throw it away.

_________. But some kinds of mold can be used to make food. For example, penicillium (青霉菌) can be used to make many kinds of cheese, such as blue cheese. These cheese are safe to eat, and they are quite delicious.

【推荐3】All of us live in one world. While we are eating food, drinking water, wearing clothes, watching TV, using computers and so on, we are producing waste every moment. When we finish reading a newspaper, the paper will become waste. When TV sets or computers are broken, they will become electronic waste.

Plastic bags are often used in our everyday life. The number of used plastic bags is increasing day by day. We like to use plastic bags because they are convenient. When we get home, we throw the plastics away. These are called “white pollution” as most plastics are white. Rubber is also common in our daily life. Many of our products are made of rubber, just like the tyres (轮胎) and the bottom part of our shoes. It’s true that rubber plays an important role in our life. However, it also brings us some trouble when it has been used for a long time. The old rubber pollutes environment very badly because it can’t break down easily in nature — it will stay unchanged for a long time. This is really a big problem all over the world.

Everyone should play a part in saving our world. For example, when we go shopping, we can bring cloth bags instead of plastic ones. And we should do something to recycle rubber. Our small actions can make a difference and lead to a better future.

Sometimes, using hand gestures can be more informative and convenient than using words, especially when you can’t speak someone else’s language. But before you head out into the world using the hand gestures you already know, you may want to do some research first to find out what signs are acceptable — and where.

V for Victory?

In Asia, "V" stands for victory. But in Western countries, it can mean peace, too. When you make the sign, be sure to have the front of your palm facing outward. Showing people the back of your hand is an impolite gesture in the UK.

L for Loser.

The letter "L", made with your thumb and index finger, stands for "Loser" and is an insult. So it’s best to avoid making this sign.

Blah-blah-blah!

This gesture looks like a talking mouth. It is often used to describe someone who is talking too much and doing too little. It’s also a little rude.

Fingers Crossed.

Crossing the index and middle fingers is used to wish for good luck. Students might make this sign before an exam. Of course, it doesn’t actually help!

This really nice hand gesture is from American Sign Language. It combines the letters "I" "L" and "Y" to mean "I love you".

Counting with Fingers.

And finally, for the most useful signs — how to count the numbers from one to ten. Notice how English-speaking countries use both hands instead of one. So the next time you go to a market in the US, remember to use these signs to bargain.

【推荐2】All living things on the earth need other living things to live. Nothing lives alone. Most animals must live in a group, and even a plant grows close together with others of the same kind. Sometimes one living thing kills another, one eats and the other is eaten. Each kind of life eats another kind of life in order to live, and together they form a food chain (事物链). Some food chains are simple, while others are not. But all food chains begin with the sun, and all food chains become broken up if one of the links (连环) disappears (消失).

All life needs sunlight to live on. But only plants can use sunlight directly. Plants are “factories”. They make food from sunlight, water and things in the soil and air.

Plants feed all other living things. Animals can only use the sun’s energy (能量) after it has been changed into food by plants. Some animals feed directly on plants, others eat smaller animals. Meat-eating animals are only eating plants indirectly.

What about human beings? We are members of many food chains. We eat wheat, rice, vegetables, and fruits and so on. We also eat meat and drink milk. But men often break up the food chains. They kill wild animals. They also make rivers, lakes and seas dirty. When these rivers, lakes, and seas are polluted, the fish in them can not be eaten. If men eat the fish, they will get strange diseases. Each form of life is linked to all others. Breaking the links puts all life in danger

【推荐3】

More and more people are using mobile phones now. Smart phones are used as televisions, cameras, and music players. They are also used for sending e-mails or surfing the Internet. If someone talks about mobile phones, many Chinese will think of Huawei.

In China, even in the world, Huawei is a wonder （奇迹）. Ren Zhengfei built up （创建）Huawei company in 1987. The company sold 58.4 million smart phones in the first season of 2019. Huawei has got the second place at the mobile market.

Now, Huawei has been the leader in 5G field. It has more than 75, 000 top engineers and scientists on research. They try their best to bring digital （数码） and high technology to every person and place. It’s more convenient for modern people to live in a rapid way. What a useful technology 5G is!

We are looking forward to seeing a stronger Huawei. It provides a faster and better communication way for us. It also brings “Created in China” to the world.