While serious training is important for all dogs, playtime is just as important.{#blank#}1{#/blank#} Use these games to help teach your dog how to play.

1）Hide and Seek

    Hide and seek isn't just for kids. Dogs can really enjoy this game. Pick up one of your dog's favorite toys or treats. Tell your dog to stay.{#blank#}2{#/blank#} When you are ready, call your dog to come to you. If possible, squeak(使吱吱叫)the toy or shake the treats. Reward your dog with praise and the toy/treat when she finds you.

2）Fetch

    Many dogs have a natural ability to fetch. Other dogs can be taught how.{#blank#}3{#/blank#}Play indoors with a soft toy or outdoors in a fenced-in area with a ball or disc. For dogs that really  love to run, try this game of fetch!

3）Find the Treat

    Dogs have superior senses of smell, and most love to use their noses to find food. Let your dog use her brain and her nose to find hidden goodies. First, have your dog stay out of sight. Then, hide her favorite treats in various places around the room.{#blank#}4{#/blank#} If help is needed, you can lead her around or point to areas for her to explore.

    Whatever the game, safety comes first! Remember to watch your dog for signs of exhaustion or overheating when you are playing. Stop if your dog seems tired or shows signs of anxiety. {#blank#}5{#/blank#}When other dogs or people are around, it may create a dangerous distraction(分神).

A. Then, go to find a good hiding place.

B. Try different games to see which your dog responds to best.

C. A good game of fetch can be played almost anywhere.

D. You can include games in training as well.

E. Also be aware of your surroundings when playing with your dog.

F. Encourage your dog to play with other dogs.

G. Bring your dog back in and tell her to “go find!”

    Australia has promised to introduce the most comprehensive （全面的） carbon trading program outside Europe in 2010. The government in Canberra plans to cut greenhouse gas emissions (排放) by at least five percent by 2020, but it could make bigger reductions if other countries agree to tougher targets.

    The Australian government warns that without tough environmental measures the country could lose key industries and jobs. Climate Change Minister Penny Wong says the economy is under threat and decisive action is needed.

    Central to the government's climate change plan is a carbon emissions trading program that will be introduced within two years. It would involve one thousand of the nation's biggest companies and would cover about three-quarters of Australia's greenhouse gas emissions.

    Many scientists believe that greenhouse gases, such as carbon dioxide and methane, contribute to global warming. Many of them are released by burning fuels such as coal and oil.

    Companies will be required to buy permits for each ton of carbon they emit, although big polluting exporters will receive up to 90 percent of their carbon licenses free.

    Many business leaders want the government to delay the plan because of the current global financial crisis, which is slowing the Australian economy. Peter Anderson from the Australian Chamber of Commerce and Industry says it is irresponsible to bring in a carbon trading plan now.

    Environmentalists, on the other hand, say Prime Minister Kevin Rudd has not properly addressed the threat of climate change. Activists had sought a minimum emissions cut of 25 percent.

    Instead, the Rudd government aims to cuts carbon emissions by at least five percent of 2000 levels by 2020. That amount could rise to 15 percent, if future global agreements set such a target.

    Ray Nias of the environmental group WWF says Australia will pay the price for low targets. “This is a deeply, deeply disappointing target,” Nias said. “It commits Australia to long-term climate change. It will make Australia's ability to negotiate (协商) global agreements very, very difficult. It is much lower than even we had imagined.”

    Australia has one of the highest per-person greenhouse emissions rates in the world because of its reliance on coal for electricity.

    Some scientists warn that the vast, dry Australian continent, which has been suffering a series of droughts in recent years, could be one of the region's hardest hit by global warming.

    True happiness is such a rare commodity(有价值之物)that the whole of the world is continuously seeking it and failing to find it. Why is happiness such an elusive(难捉摸的) thing? Is it that it cannot simply be achieved? Or is it that it is not where all of us have been looking for it?

    What is it that we consider happiness? This is how I see it: Happiness is what you feel when what you want to happen happens. And the then we can conclude that unhappiness is what we feel when what we want to happen does not happen.

    The main keyword in definition is "want". The whole trouble starts when we want something. Every moment of our lives we keep on wanting something or the other. Only a small percentage of all our wishes is fulfilled in spite of all our endeavors(努力). The frustration of failing to fulfill most of our wishes sets in. We start feeling weighed down. Desire is a seed which grows fruits of unhappiness. Actually the trouble is that we demand too much. The only solution to this problem is to break out of this cycle of desires and struggles.

    Actually, happiness and unhappiness are two sides of the same coin. The desire for happiness is like asking only for the light and not for darkness. But there is not much difference between light and darkness. It is matter of degree only.

    If we think deeper, we will realize that it is this pain of failure, pain of frustrated desires which is of greater significance to us. It is actually like good health. One can only define health as an absence of diseases. In order to have good health we strive to avoid diseases. You cannot purchase or achieve good health directly. You have to take steps which keep your body free of diseases. Then only the organs of body keep functioning properly and you experience good health. Similarly, when one destroys the root cause of unhappiness, the problems are over. And the root cause of all our unhappiness is DESIRE.

    Young people can have problems with their minds. Some students become worried because they have to study very hard. Others have trouble getting on well with people like their parents and classmates.

    Li Wen, a junior 2student from No.2Middle School, could not understand his teacher and was doing badly in his lessons. He became so worried about it that he started to cut his finger with a knife. Another student16yearold Yang Fang from No.1Middle School, was afraid of exams. She got very worried in one and when she looked at the exam paper, she couldn't think of anything to write.

    A recent report from Jiefang Daily says about 18% of Shanghai teenagers have mental problems. Their troubles include being worried and very unhappy and having problems in learning and getting on with people. Many students who have problems won't go for advice or help. Some think they will look stupid if they go to see a doctor. Others don't want to talk about their secrets Liang Yuezhu, an expert on teenagers from Beijing Anding Hospital has the following advice for teenagers：

    Talk to your parents or teachers often.

    Take part in group activities and play sports.

    Go to see a doctor if you feel unhappy or unwell.

    If you cannot afford to travel in any class above economy, flying generally sucks, either a little or a lot, depending on your tolerance level. But it especially sucks if you are too wide for the airline's design.

    Just getting to your seat can be a challenge, as your hips (臀部，髋) bounce from seat to seat on each side of the aisle (过道). If someone is standing up to put things in the overhead locker, there is a decision to be made about whether it's worth trying to squeeze past. Everything is just slightly too small: the seats, the overhead lockers, even the bathrooms—and those, it seems, are getting even smaller.

    The Washington Post recently reported that, on some newer planes flown by American, Delta and United airlines, the bathrooms in economy class are just 61cm wide: about 25cm narrower than the average portable toilet, and roughly the width of the average dishwasher. Your face might be the only thing you can poke in there comfortably—which makes it a poor design, considering what a passenger is likely to need the bathroom for.

    According to the manufacturer, these "Advanced Spacewell" bathrooms make space for six additional passengers, which is great for the airlines' financial bottom line. But what about the other bottom line? Concerning, well, bottoms that can't fit into their planes' bathrooms?

    As bodies get bigger and aeroplane spaces get smaller, the wide among us have come up with solutions. Armrests that turn us into sausages (香肠) can be pulled up, or slowly encased (围住，包起) into the soft flesh of our sides until we go numb (麻木). We can ask the flight attendant to get us a seat-belt extender, if security has confiscated the one we brought with us, as can sometimes happen. But squeezing into a tiny toilet and closing the door behind us? Not workable.

    Unlike the impossible task of squeezing down the aisle to your seat, or the side-to-side dance necessary to get big hips past the armrests, fitting into a space just 61cm wide is not just a challenge—it is almost impossible. It is not like missing out on an option for the in-flight meal—a bathroom is as essential as a safety-compliant seat belt, or the air that is pumped in to the cabin (飞机舱). If airlines are not willing to make space for us, bigger passengers may have no option but to reconsider booking a flight at all.

    It seems that electronic devices just keep getting smaller. Scientists in the United States have announced the creation of the first transistor with only two dimensions(二维).

    A transistor is a small electronic device that transfers or carries electronic current. Scientists hope these new 2D transistors will be used for building high-resolution(高分辨率)displays that need very little energy.

    Two groups of scientists created these 2D transistors. They report that the transistors are only a few atoms thick.

    Usually transistors are made with the element silicon(硅). Computer processors, memory chips, TV screens and other electronic devices contain billions of silicon-based transistors. But these very small electrical parts have certain limitations.

    Dimitris Ioannou is an electrical engineering professor at George Mason University. He says the traditional transistor has been improved as much as it can be. He adds that researchers have been looking for new materials with special features and they want transistors to be seen through and soft.

    "If the layers are very thin, the transistor can become flexible, so it doesn't have to be rigid(坚硬的), like it would be in a silicon chip. So people can think of applications like wearable electronics, television screens and other things," said Ioannou.

    These new transistors can also carry higher current. They also can move the current much faster than traditional transistors. This is important for high-definition screens.

    Dimitris Ioannou says the scientific success could prove very useful in the future. "Now, how good and how useful it will be, it's still in the stage of research, but it certainly is an advance," said Ioannou.