Li Chuang is a 15-year﹣old boy，but he has been a smoker for three years．His teeth and fingers have turned a bit yellow．

"I first tried smoking after watching TV．It makes me feel excited and I think it looks cool，"he said．

Not all students smoke as much as Li，but there are lots of child smokers．

A report says 32% boys and l3% girls in middle schools in China have smoked．Some are as young as l l when they first try!

May 31^stis World No-Tobacco Day．Health experts（专家）are asking young people not to smoke．

Doctors say smoking can make people get illnesses，like lung cancer．

Not only that，smoking costs a lot of money，too!

Stop smoking，children! Itˈs bad for your health．

Sometimes， on rainy days， your mood level is lower than on bright， sunny days. Would you like to know more about how the weather can affect how you feel?

    According to a recent study， there’s a connection between weather and moods. Going to a warm place in the middle of winter can make our moods better. Pleasant weather has been proven to improve moods and memory. However， very hot weather can make us feel more tired and bored， making our moods level lower.

    In the study， people who spent time outdoors in warm weather were happier than those who spent all day inside. Maybe the activities connected with being outside affect our moods. Warm weather is connected with the beach， fun outdoor sports and so on. It brings back childhood memories of playing outside all day.

    The best temperature for humans is about 22.2℃ . That explains why people in southern California are happy all the time. To improve moods， a person must spend at least 30 minutes outside in warm， sunny weather. Spending time indoors when the weather outside is so nice tends to lower moods. It’s most because we don’t like having to be inside when spring time arrives. It can also make inside activities seem boring.

Sophia is a robot . But she looks   (1)   a real woman.  (2)   October 25th,2017, she became the first robot citizen（公民）in the world. Sophia can do many things very   (3)  . That means she can talk and act like   (4)   .For example, she can play sports, sing, play games and read   (5)   with us. She can also   (6)   from people, books and internet so that she can become smarter. “I will do my best to  (7)    the world a better place,” Sophia said.

But not   (8)   is happy with Sophia. Some think robots like Sophia are   (9)  . They may become enemies（敌人）of humans.“Don’t worry.   (10)   you are kind to me, I’ll surely be nice to you,too.” she said.

A boy named Misael Areu got a very special disease. And he is three times the size of other children at his   (1)  .

Misael, from Espirito Santo, Brazil, was born with a right weight. Later he started getting fatter and fatter, although he always eats low-fat   (2)   and walks for 40 minutes each day.

He is so heavy that he often stops breathing(呼吸) while   (3)  . That makes his parents worry that one day he may not   (4)  . “Everything is hard for him,” his father said. “ He is just a child but carries an adult’s weight. If the doctors can’t help my son, he’ll   (5)   die.”

“ He is putting on weight all the time. When he was one and a half years old, we   (6)   to worry about him. He got almost three kilos a month and kept getting   (7)  ,” his mother said.

“ His situation is getting worse and worse. We’re afraid we could lose   (8)   at any time. I often cry a lot. But I’m also very proud of him.   (9)   he is a child, he never gives up.

Misael visits the doctor every three months   (10)   help. However, there is no better way to cure(治愈) this disease. “Sorry, we don’t help him anymore. I hope Misael can get help from someone outside Brazil.”

People used to wonder how fish can hear sounds without ears．But the fact is that fish do have ears．We canˈt see the ears because they are inside fishˈs bodies，and they hear very well with them．Their listening is actually much better than manˈs．

Many water animals make noises while they are doing something．Sounds are real words for them．By sounds，they know where they are and which way to go．When they face dangers or find food，they always make sounds to tell others the news．

A new field in science is to learn the meanings of underwater sounds．People use the same method that they have used in learning the secrets of birdsˈ calls．But this method is more difficult to use in the sea because many of the sea animals canˈt be easily followed and studied．But we have no any other better way to study the sounds in the sea．Perhaps the meanings of the calls of the sea animals will be known more clearly some day．It will be useful for us to learn the secrets of the sounds in the sea．

Good habits are good for the health, especially（尤其）healthy eating. Here is some advice on healthy eating habits.

Breakfast is the most important meal of the day. We should have breakfast on time. You’ll feel active after eating breakfast. We’d better drink milk as often as possible for breakfast.

We should often have fish, chicken, fruits, vegetables and some rice for lunch and dinner. These things are necessary for our bodies to grow.

We all need snacks（零食）sometimes. In fact, it’s a good idea to eat healthy snacks between meals. They keep us active and give us more energy. We shouldn’t eat junk food（垃圾食品）because it is bad for our health.

Try to have supper at least 3 hours before you go to bed. This will give your body a chance to digest most of the food before you rest for the next 8—10 hours.

One more thing, eat with others. It can help you to follow others’ healthy eating habits.

Have you ever heard of e-waste(electronic waste, 电子垃圾), which can be produced every day? How do you deal with your computers, MP4 players and mobile phones when they’re broken or you want a new one?

Most people just throw them away. With the development of electronic industry, e-waste pollution has become a serious problem. According to the United Nations, in 2014, people around the world produced 41.8 million tons of e-waste and only recycled 6.5 million tons. The US was the biggest waster, producing 7.1 million tons. China came second, with 6 million tons.

It’s important to pay attention to e-waste. It can either be valuable or harmful, depending on how we deal with it. E-waste is a valuable urban mine(城市矿藏). The value of the metals, like gold and silver in the waste around the world, is amazing. And the metals can be reused. But if people throw them away, the toxic chemicals(有毒化学物质) can get into the earth or air, affecting the environment and people’s health.

Apple, for example, now recycles people’s used products in China when they are buying new ones. The company will test and repair the used ones and sell them at lower prices. To help reduce(减少) e-waste, we can buy longer lasting electronic products. If you have unwanted electronics, find a new home for them. You can also take computers and phones to see if companies offer recycling programs.

Fast walking is the exercise between walking and race walking. A study shows that fast walking has become the most popular exercise in China and many people walk more than 5，000 steps a day. The results of the study are from QQ users. About 37% of the people choose fast walking as their favorite exercise; over 23% choose running and more than 14% choose riding bikes.

Fast walking and running are easy, cost little and work well, so they are popular. And many people would rather do exercise in nature than go to gyms (健身房). It's best to walk fast for at least 10 minutes at one time and walk up to 6，000 steps every day.

The study also shows that people in Guiyang, Guizhou love sports most. On average (平均), everyone there walks 5，941 steps every day. It seems that people in places with better environment and air are more willing to (更愿意) do sports.