2 . Please don't feel singled out, special, or view yourself as a chosen one. She bites everyone. This is just the nature of the beast. There is absolutely no truth to the persistent myths that mosquitoes fancy females over males; that they prefer blondes and redheads over those with darker hair；or that the darker or rougher your skin, the safer you are from her bite. It is true, however, that she does play favorites and feasts on some more than others.

Blood type O seems to be the choice over types A and B or AB. People with blood type O get bitten twice as often as those with type A, with type B falling somewhere in between.

Those who have higher natural levels of certain chemicals in their skin, particularly lactic acid （乳酸），also seem to be more attractive. From these elements, she can analyze which blood type you are. These are the same chemicals that determine an individual’s level of skin bacteria and unique body smell.

Mosquitoes are also attracted by perfumes, soaps, and other applied fragrances. While this may seem unfair to many of you, she also has a desire for beer drinkers.

Wearing bright colors is also not a wise choice, since she hunts by both sight and smell, the latter depending chiefly on the amount of carbon dioxide sent out by the potential target. So she can smell carbon dioxide from over 200 feet away. When you exercise, for example, you emit more carbon dioxide through both breath and output. You also sweat, releasing those appetizing chemicals, primarily lactic acid, that invites the mosquito's attention.

Lastly, your body temperature rises, which is an easily identifiable heat signature. On average, pregnant women suffer twice as many bites, as they have a slightly raised body temperature.

Please don't go on a shower, exercise or give up your beloved beer and bright T-shirts just yet. Unfortunately, 85% of what makes you attractive to mosquitoes is fixed in advance in your genetic circuit board （电路板）.At the end of the day, she will find blood from any exposed target of opportunity.

A New Addition to the Family

For the initial ten years of his life, Victor was the prince of the household. As he was an only child, his parents petted him and showered all their love and attention on him. Whatever toys his parents bought, they were always meant for him. Whatever food was in the refrigerator, there was no one to compete with him to polish it off first. Victor could leave his toys or books around the house with complete ease of mind, knowing that there was no one who would get their hands on his belongings and cause any damage.

However, all that was to change overnight when Victor’s parents brought back his new baby sister, Lina, from the hospital. With her rosy cheeks, wide open eyes and angelic smile, Lina caught the hearts of her parents, grandparents and relatives. Everyone focused their attention on the cute bunch of joy. Whenever she cried, her mother or father would rush to her bed. She simply cried because she wanted to be carried. There was little time left for Victor.

Now that Victor’s mother had his baby sister to take care of, she expected Victor himself to do most of the chores he can do. Victor was asked to clean his own room, iron his own school uniform and clean his own shoes. Before Lina’s arrival, he had never lifted a finger to help out with these tasks. The whole family also went out less because it was unhealthy to expose Lina to the bacteria(细菌) being in the outside world too often.

Victor felt neglected by his parents. He felt that they loved Lina more than him. As a result, he tried to attract his parents’ attention by becoming resistant. One evening, Victor’s parents were called up by his teacher because Victor had got into a fight at school. His teacher had noticed Victor’s behaviour and work attitude changing downwards in the past two months. Before that, he had been a model student.

Upon hearing the teacher’s feedback, Victor’s parents got lost in thought.

Victor realized that his parents still cared for him.

“No 7, Jobie Nymble, takes the lead,” cried the announcer. “Just one more hurdle (跨栏) and ...” Cheers broke out. “Jobie Nymble from Riverside Middle School takes first place in the girls’ 100-meter hurdles!” The crowd went wild.

“County championships (锦标赛), here we come,” screamed Jobie, patting her green track spikes (钉鞋). They were her lucky shoes and she loved them. “Next Saturday, we’re taking home the gold,” Jobie whispered to her spikes, excitedly retying them.

“Don’t forget, guys,” said Marisol, one of her teammates. “My birthday party is next Friday at Hidden Park.”

Next weekend couldn’t come soon enough. Jobie smiled with excitement all week long. At track practice, she leaped over those hurdles faster than she’d ever leaped before. And it wasn’t long before everything in her path was a hurdle: flowerpots in her front yard, sidewalk cracks on the way to the bus stop and even her little sister, Teka!

The day of Marisol’s party, Jobie put on her favorite outfit: her blue shorts, an old track T-shirt from her dad, and her lucky spikes. “Perfect.” She smiled at herself in the mirror.

The party was under way when Jobie arrived at Hidden Park. She stopped by the track first, planning to do some practice.

“Jobie!” Two of Jobie’s teammates rushed toward her, breathless and barefoot. “Come on,” they yelled. “You have to try the slide.”

Jobie looked toward the party area. Suddenly, she saw it. The biggest slide she had ever seen was on the far side of the park. Smiling kids zoomed down the slide at unspeakable speeds. Without thinking twice, Jobie took off her spikes and dashed (猛冲) toward the slide. Its ladder stretched to the sky, but she reached the top in no time, closed her eyes and let go.

Jobie couldn’t get enough. She tried again and again. When it was finally time to go home, she unwillingly made her way back to the track where she’d left her shoes.

As she eyed the area from a distance, panic set in.

The next day, Jobie turned up in a new pair of spikes for the championships.

7 . Give with Love

Choosing a charity to support isn't as easy as picking one out of a hat.    1     . Here are a few things to consider to help you choose.

What cause do you want to support?

Typically, the first thing that people think about when choosing a charity to support is the cause. There are children’s charities, animal charities and charities that raise money and awareness for a wide range of illnesses, disabilities and issues.     2    .

Do you want to support a large or small charity?

There are big name charities such as the Red Cross, SPCA and Barnardos.    3    , some of which work at a local level. Decide whether you want to contribute to a large and potentially powerful charily that will be making big waves but will have high running costs, or whether you want to support and contribute to a smaller charily that might only help a few people al a lime but will be fighting to get noticed and raise funds.

Find your reason

Once you have decided that you would like to give some of your time or money to help others, you need to make some decisions. For instance, volunteering.    4    , while others want to meet new people, Perhaps you have been affected by a particular charity supports, such as cancer or child abuse. Or perhaps you want to add your support to your local school which relies on parents and other members of the community to help children with their reading and maths.

    5    

Think about your existing skills: do you prefer hands-on work, are you good with people, do you have a background in administration or secretarial work? Charities need a wide variety of skills, such as working in shops, organising fundraising events, driving vehicles or. in the case of animal charities, walking dogs or checking out foster homes.

For many people in the world, food waste has become a habit: buying more food than we need at markets,     1     (let) fruit and vegetables spoil at home or taking more than we can eat.

These habits put extra pressure     2     our natural resources and damage our environment. When we waste food, we waste so much labour, effort,     3     (invest) and the precious resources that go into producing it, not to mention the resources in transporting and processing it. In short, wasting food increases greenhouse gas emissions and     4     (contribute) to climate change.

It's     5     urgent issue. In fact, tons of food is lost or wasted     6     (global) every day. The part of food that is lost from harvest up to, but not including, the retail level is called food loss. The part wasted at the consumer or retail level     7     (refer) to as food waste. We make this distinction to address those root     8     (cause) of this problem, a problem that everyone from farmers and producers to customers can help end.

Reducing food loss and waste is essential in a world     9     millions of people go hungry every day. When we reduce waste, we respect that food is not a given. It's up to us     10    (change) our habits to make not wasting food a way of life!

10 . Wearing a caveman mask, Dr. John Marzluff walks across the campus at the University of Washington in Seattle. Crows (乌鸦) circle and squawk (尖叫), diving at him and away.

Beneath the mask, he smiles. Days before, he and his students, wearing caveman masks, trapped them and placed colored plastic bands on their legs. Then they released the unhappy birds. When the researchers wandered around campus without the masks, the crows they had caught and banded did not react to them. But when the same humans walked by while wearing the masks, the crows scolded loudly and dived at their “enemies”.

At first, only the banded birds reacted aggressively to the people in masks. But in later tests, more and more crows joined in, and even when the banded birds were not around. “Crows think and dream, fight and play, reason and take risks,” he says. “Their antics confuse us.”

This led him to study how crows’ brains work. He and his students wore one type of mask as they captured crows and brought them into the lab, training them to link that face with danger. Then a different kind of mask for more positive activities, such as feeding and caring. Then he worked with scientists at the university who scan animal brains to see which parts of a crow's brain do certain tasks. Surprisingly, the scientists found that when the crow saw the “danger” mask, one part of its brain became active. When the crow saw the “care and feeding” mask, a different part of its brain lit up. The team has shown that crows use the same parts of their brains for recognition that humans do — something that was not known before!

More than 10 years after the first mask experiment, campus crows still scold the “cavemen”. Crows also recognize people who are kind to them. Crows are always watching us... and they remember.