For a 400-year-old art form, opera had a bad fame: overweight actresses singing the words which were hard to understand in one of those romance languages you were supposed to learn in high school. And with tickets costing as much as＄145 a performance, opera goers also had a certain appearance in people's mind: rich, well-dressed and old.

    But now opera companies around the country are loosening their ties and kicking off their shoes in an attempt to keep opera alive and take it to a younger and not so wealthy audience.

    Opera producers have found that to attract this crowd, they need to associate opera with common people. Because young people don't or won't come to the opera, companies are bringing the opera to them, giving performances in such unusual places as parks, libraries and public schools.

    The Houston Grand Opera's choice is the public library, where it performs “mobile operas”, shortened version(剧本) of child-friendly operas. This summer's production is Hansel &Gretel. By performing smaller versions of large productions, producers are able to make people interested while keeping costs at a reasonable level. The San Francisco Opera, which will be celebrating its 75^th anniversary this year, is staging Cinderella free of charge, keeping costs down by employing students from its Young Artists' Training Program.

    We are a primary school in England. Our students start arriving at our playground from about 8:45 a.m. Most of the children live nearby, so they walk to school. But some children have to travel to school by car. Each of the children is dressed in a school uniform (校服) and carries the homework and packed lunch in a schoolbag.

    School starts at 8:55 a.m. The teacher on duty blows a whistle (哨子) and the children line up in their class groups. They wait quietly for the teacher to send them to their classrooms. When they arrive at their classrooms, the children empty their schoolbags and put their homework in their boxes. After the children take their seats, the teacher reads out each child's name in turn. Upon hearing his / her name, the child replies “yes, Mrs. (the teacher's name)” and the teacher writes down whether the child is in school or not.

    And then at 9:10 a.m. the children attend an assembly in our main hall. They sit on the floor in rows with the youngest children at the front and the older children at the back. As the children enter the hall, they listen to music quietly. Each week we have a different musical theme (主题). Besides, the children also listen to stories.

    After the assembly, the first lesson of the day begins at 9:30 a.m. Our morning lessons are usually English and Maths. Each of these lessons lasts an hour. Between classes, the children have their morning break from 10:20 a.m. to 10:35 a.m. They eat their snacks (小吃) or play games like football on the playground. At the end of the break, the teacher on duty blows a whistle. The children stand still and wait to be told to line up.

    Each day, the children have their lunch break from 12 noon to 1:10 p.m. Most of the children bring their own packed lunches from home. A packed lunch usually consists of sandwiches, fruit, a drink and a packet of crisps. Some children have a school dinner cooked in our school kitchen. While the children are waiting to have lunch or after they have finished eating, they play games on the playground or attend lunch-time clubs. We have teachers on duty, who look after the children during lunch breaks. After the lunch break, the children have afternoon lessons, which continue until 3:15 p.m. when the children go home.

    A woman lost the sight in one eye after going swimming in a pool at a hotel wearing contact lenses（隐形眼镜）. Jennie Hurst, from Southampton, suffered from a rare and painful infection caused by amoeba（变形虫）in water. The infection causes people to be sensitive to light and the 28-year-old said she had to stay in a dark room for three months. She is now warning of the dangers of swimming or showering wearing contacts.

    Ms Hurst experienced four operations and a treatment in which she had eye drops every half hour. "During that time I stayed in my bedroom with black curtains at the window. The only thing I could do was to listen to the radio. One evening, I was so eager to look out of window to get a look of the outside world that I opened my curtains in the middle of the night. As soon as I did this the moon shone in my eyes and it really hurt. I didn't do that again. I have been left with no sight in my left eye and the damage to my right eye could be lasting," she said.

    Ms Hurst had been wearing contact lenses for five years. "I don't even like swimming,"she said. "My friends were quite surprised that I had gone swimming and probably thought that I had been a bit lazy. I wasn't aware of the problem at all — it didn't even enter my brain to take them out. I felt responsible that I had let it happen when actually I could have just taken my contacts out."

    Toronto is reminding citizens this month what exactly can and can't go into the blue bins an you may be surprised at what can't be recycled. As it turns out the takeout coffee cups you've been throwing into the recycling actually have to go in the garbage.

    The city's “recycle right” web explains that food left after a meal, woven (编织的) cloth, old VHS tapes and other things have been turning up in blue bins, where they don't belong.

    According to the city, about 45,000 tunes of garbage was mistakenly put into recycling bins last year alone.

    Among those things are the takeout coffee and tea cups we get while were on the go. The city says that because those paper cups are lined with plastic or wax they can't be recycled. The black plastic coffee lids (盖子) also can't go in the blue bin, although non-black plastic lids can be recycled.

    Emily Alfred, senior campaigner with the Toronto Environmental Alliance, said, “Millions of cups are used in Toronto every year and people are taking these out and putting them in the wrong bin.”

    When paper coffee cups are thrown in with the recycling. Alfred said, they produce a harmful effect on the system.

    “They can't separate the plastic and paper in a typical paper recycling center,” Alfred said, “so it just causes pollution of the recycling process, and it causes lower-quality paper if it does get recycled.”

    “New regulations passed last month call for changes to be rolled out over the next few years regarding what products companies can sell,” Alfred said. Her organization will be pushing for more producer responsibility laws, which call on companies that design and make products to take on the responsibility of recycling them.

    For now, consumers can consider carrying their own reusable coffee cups while they are on the go, ask for a ceramic mug (陶瓷杯) if they plan to consume their drink in the cafe, and support their local government officials if they have put efforts into changing recycling or producer responsibility laws.

    Alfred said, “I think people can change their habits easily if they understand what to do.”

    I found the last outdoor table at my favourite cafe. Reading as I ate my breakfast slowly, I was enjoying the feeling of the cool wind and the warm sun when a table next to me opened up. A woman, who had been standing nearby, clearly waiting for a seat, stepped towards the table. But from the other direction, straight from the parking lot, came a man who got to the table first.

    The woman, with a smile on her face, explained that she'd been keeping her eye on that table for several minutes and had been on her way over. The man, also smiling but determined, told her she was out of luck.

    She stood off the side, clearly disappointed, and greeted her friend with the disappointing news. I sat at my table, taking in the scene, and suddenly I realized that I had an opportunity to be kind.

    I stood up and asked her to come to my table. Quietly, I told her I had seen what had happened, and I was happy to give her my table. I was only going to be there a few more minutes anyway, so I was happy for her and her friend to have the seat.

    "But where will you sit?" she asked. I was almost done eating, I said, and I would find a seat at the counter (柜台) inside. She thanked me and beamed with delight as she invited her friend to sit down.

    Thinking about it as I finished up, I realized that whether or not the woman had acceptable demand for the table was unimportant. The feeling of the situation -- the look of hurt on her face -- had struck me, and I had the ability to do something about it.I just hope that woman's morning at the cafe was great. I know mine was.

    However exciting space exploration sounds, there's a necessary and important point about it that needs to be considered: food supplies. Right now, astronauts typically rely on dry food in airtight bags and cans, since there are strict weight limits on items taken into space. Foods that we take for granted, such as fresh fruits and vegetables, are out of the question for space explorers.

    For those who've made an effort to try to grow food during space flights, they've faced many difficulties, including the absence of gravity, and a lack of soil, air and humidity (湿度). However, growing food to add and minimize (最小化) the food that must be carried to space will be increasingly important on long-duration flights into space. Great efforts have been made to explore the concept (idea) of space farming. Recently, a team led by Federico Maggi at the University of Sydney in Australia have worked out how plants can absorb nutrients from human urine (尿), as was reported by New Scientist on March 27.

    After over 20 years of experiments, the results suggested that human urine could supply three to four out of the six nutrients that plants need. The researchers also found out that urine-fertilized plants produce no harmful by-products, such as carbon dioxide or ammonia.

    According to New Scientist, human urine is 95 percent water, with the other 5 percent made from nutrients which are harmful to the human body but not to plants. The advantage of this urine-fueled life support system is obvious: By recycling liquid waste and producing food, an efficient cycle will be created.

    And most importantly, said New Scientist，the duration of space flights will be greatly extended to “20 years of flight”, meaning we may be soon sending astronauts on flights to Mars, or even beyond.