To help the environment, many Americans have made the change from paper and plastic bags to reusable shopping bags.But a report by a Florida newspaper says that reusable shopping bags sold by some supermarkets have high levels of lead(铅), which can be dangerous to humans, especially young children.Now, there's a call for a rethink about the use of reusable shopping bags.

     “When our families go to the store looking for safe and healthy foods, the last thing they should be worrying about is a bag，”Charles Schumer, a government official said.“Quick and complete research will allow everyone to make right decisions.”

    The newspaper bought more than a dozen bags sold at Publix supermarkets from Florida supermarkets to test them for lead.The results showed that certain bags had lead levels that worried health officials.Some bags had enough lead in them to be considered dangerous waste if people were to throw the bags out with other rubbish.Lead in the bags is not likely to move onto food.But over time, paint (油漆) on the bags can break off and the bags can wear out.When this happens, lead can be freed.

    The affected (受影响的) bags were found in Florida.But Publix has more than 1，000 stores across America.Publix says that its bags don't break any laws about lead levels, but that they have asked the makers of the bags to reduce(降低) the lead levels in them.

    The bags with the highest levels of lead had beautiful designs and many pictures.Plain reusable bags without them are found to have little lead.People worried about lead levels in reusable bags can turn to cloth.Paper bags are also a good choice, since paper can be reused.

    I received a call today asking if I would be willing to bring food to a family in need. The mother was having a major operation and would be lying down for several weeks. Of course, I responded with an immediate Yes!

    As I planned the meal in my head, I reflected on how many times over the years I had been asked to prepare food. I have done so countless times with a very open heart. But the truly amazing thing is that I have received double over the course of my life. When my mother passed away, our house was filled with fresh dinners for weeks. A woman from the church of our community stopped by each evening with some food. The gift of food was her small way of trying to ease our pain. Later in my life, when I was on bed rest during my pregnancy with twins, women of the church again stepped in to help. They arranged babysitting for my two-year-old daughter, and brought lovely dinners to our house. Even when I was put in the hospital, my husband would bring cooked meals to my hospital room. How we relied on these dinners to feed my tired husband and young daughter. Food is all about comfort. It feeds our bodies, but it can also feed our souls. When you hear people talking about their favourite holidays, it usually includes their feelings connected with sharing food. I know that I will have many more opportunities in my lifetime to prepare food for others. It is truly a gift I want to prepare and deliver to someone in need.

    We've considered several ways of paying to cut in line: hiring line standers, buying tickets from scalpers (票贩子), or purchasing line-cutting privileges directly from, say, an airline or an amusement park. Each of these deals replaces the morals of the queue (waiting your turn) with the morals of the market (paying a price for faster service).

    Markets and queues—paying and waiting—are two different ways of allocating things, and each is appropriate to different activities. The morals of the queue, “First come, first served, have an egalitarian (平等主义的) appeal. They tell us to ignore privilege, power, and deep pockets.

    The principle seems right on playgrounds and at bus stops. But the morals of the queue do not govern all occasions. If I put my house up for sale, I have no duty to accept the first offer that comes along, simply because it's the first. Selling my house and waiting for a bus are different activities, properly governed by different standards.

    Sometimes standards change, and it is unclear which principle should apply. Think of the recorded message you hear, played over and over, as you wait on hold when calling your bank: “Your call will be answered in the order in which it was received.” This is essential for the morals of the queue. It's as if the company is trying to ease our impatience with fairness.

    But don't take the recorded message too seriously. Today, some people's calls are answered faster than others. Call center technology enables companies to “score” incoming calls and to give faster service to those that come from rich places. You might call this telephonic queue jumping.

    Of course, markets and queues are not the only ways of allocating things. Some goods we distribute by merit, others by need, still others by chance. However, the tendency of markets to replace queues, and other non-market ways of allocating goods is so common in modern life that we scarcely notice it anymore. It is striking that most of the paid queue-jumping schemes we've considered—at airports and amusement parks, in call centers, doctors' offices, and national parks—are recent developments, scarcely imaginable three decades ago. The disappearance of the queues in these places may seem an unusual concern, but these are not the only places that markets have entered.

    It is a cold and dry winter morning. When you wake up, you feel that your throat hurts. You begin to sneeze and later you may cough. You must have a cold! Wait a moment. Could it just be a common cold or the flu that's been going around?

    A cold gives you a runny nose and cough. But it's usually easy to deal with. Some take medicine while others drink herbal tea or chicken soup. Usually you feel better after a week.

    On the other hand, the flu can be much more dangerous. It usually gives you fever.

    Sometimes it can cause death. According to an American magazine, the worst flu killed about 50 million people from 1918 to 1919.

    Don't worry. If you get a flu vaccine（疫苗）, it can stop you from getting the virus. Flu vaccines work by giving the body a small amount of flu viruses. This causes your body to develop antibodies. So next time you get the flu, the antibodies should help you.

    The flu virus changes every few years. Therefore, there are so many types of flu, such as H1N1 and H5N1. The antibodies for one type of flu can't help us against all types of flu. That's why we need to get vaccine every year.

    However, good health habits may also help stop you developing a cold or flu. Washing your hands often helps stop you from getting viruses. It is also important to get regular exercise and eat healthy food. All these can help you strengthen your immune system.

    The 65-year-old Steve Goodwin was found suffering from early Alzheimer's (阿尔楚海默症). He was losing his memory.

    A software engineer by profession, Steve was a keen lover of the piano, and the only musician in his family. Music was his true passion, though he had never performed outside the family.

    Melissa, his daughter, felt it more than worthwhile to save his music, to which she fell asleep catch night when she was young. She thought about hiring a professional pianist to work with her father.

    Naomi, Melissa's best friend and a talented pianist, got to know about this and showed willingness to help.

    "Why do this?" Steve wondered.

    "Because she cares." Melissa said.

    Steve nodded, tears in eye.

    Naomi drove to the Goodwin home. She told Steve she'd love to hear him play. Steve moved to the piano and sat at the bench, hands trembling as he gently placed his fingers on the keys.

    Naomi put a small recorder near the piano, Starts and stops and mistakes. Long pauses, heart sinking. But Steve pressed on, playing for the first time in his life for a stranger.

    "It was beautiful." Naomi said after listening to the recording. "The music was worth saving."

    Her responsibility, her privilege, would be to rescue it. The music was sill in Steve Goodwin. It was bidden in rooms with doors about to be locked.

    Naomi and Steve met every other week and spent hours together. He'd move his fingers clumsily on the piano, and then she'd take his place. He struggled to explain what he heard in his head. He stood by the piano, eyes closed, listening for the first time to his own work being played by someone else.

    Steve and Naomi spoke in musical code lines, beats, intervals, moving from the root to end a song in a new key. Steve heard it. All of it. He just couldn't play it.

    Working with Naomi did wonders for Steve. It had excited within him the belief he could write one last song. One day, Naomi received an email. Attached was a recording, a recording of loss and love, of the fight. Steve called it "Melancholy Flower".

    Naomi heard multiple stops and starts, Steve struggling, searching while his wife Joni called him "honey" and encouraged him. The task was so hard, and Steve, angry and upset, said he was quitting. Joni praised him, telling her husband this could be his signature piece.

    Naomi managed to figure out 16 of Steve's favorite, and most personal songs. With Naomi's help, the Goodwin family found a sound engineer to record Naomi playing Steve's songs. Joni thought that would be the end. But it wasn't.

    In the months leading up to the 2016 Oregon Repertory Singers Christmas concert, Naomi told the director she had a special one in mind: "Melancholy Flower"

    She told the director about her project with Steve. The director agreed to add it to the playing list. But Naomi would have to ask Steve's permission. He considered it an honor.

    After the concert, Naomi told the family that Steve's music was beautiful and professional. It needed to be shared in public.

    The family rented a former church in downtown Portland and scheduled a concert. By the day of the show, more than 300 people had said they would attend.

    By then, Steve was having a hard time remembering the names of some of his friends. He knew the path his life was now taking. He told his family he was at peace.

    Steve arrived and sat in the front row, surrounded by his family. The house lights faded. Naomi took the stage. Her fingers. His heart.

    Have you ever considered all the English expressions that include words about clothes? Let's have a look.

    People wear pants to cover the lower part of their bodies. We sometimes say that people who are nervous have ants (蚂蚁) in their pants. Sometimes, people may get caught with their pants down. They are found doing something they should not be doing. And, in every family, one person takes control. Sometimes a wife tells her husband what to do. Then we say she wears the pants in the family.

    Pants usually have pockets to hold things. Money that is likely to be spent quickly can burn a hole in your pocket. Sometimes you need a belt to hold up your pants. If you have less money than usual, you may have to tighten your belt.

    I always praise people who can save their money and not spend too much. I really take my hat off to them. Yet, when it comes to my own money, I spend it at the drop of a hat, which means I instantly spend it.

    Boots are a heavy or strong kind of shoes. People who are too big for their boots think they are more important than they really are. I dislike such people. My father is an important person. He runs a big company. He wears a suit and tie, and a shirt with sleeves (衣袖) that cover his arms. Some people who do not know him well think he is too serious and never shows his feelings openly. But I know that my father wears his heart on his sleeve.