user: *Question*
Article: Durban -- Canada Monday became the first country to pull out of the historic Kyoto Protocol  , inescapably scarring the global anticlimate change efforts.  The Kyoto Protocol, which set different duties for all countries to cut emissions  , states that different countries should reduce their collective greenhouse emissions accordingly.  However, the United States refused to sign the protocol in 2001, and is the only developed country that has not agreed to sign it. The move has cast a shadow over the global community, and has made some other developed nations hesitate to cut their emissions. To add fuel to the fire, Canada, became the first to call it quits, with the deadline of the first commitment period (20082012) approaching.  The biggest concern at this moment is whether other developed countries would follow suit.  Over the past four years, a drama has unfolded among developed countries over the emissions cuts and offering support to their developing partners.  The Umbrella Group, consisting of Japan, Canada, Australia, the United States and other developed countries, hesitated and even backed away from their positions under certain excuses. The first one quoted by Canadian Environment Minister Peter Kent is that emission cuts damage the economy. Still another is requiring China and India to have the same duty of cutting emissions as developed countries.  Actually, if emissions in developed countries could fall to the levels in developing countries, it would greatly help the fight against global climate change.  In sum, any irresponsible action, in the anticlimate change campaign should be a cause for blame. It is widely hoped that the United States and Canada will see reason and join the rest of the world community in supporting the Kyoto Protocol. Question: People now are most worried   _  . Yes or no, is the answer "whether more developed countries will do the same as Canada"?
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Yes

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Article: Joker found one of the biggest diamonds in the world right in his own back yard. He sold the stone to a diamond dealer for over three hundred thousand dollars. In New York, the diamond was resold---this time for almost eight hundred thousand dollars. The true value of a diamond is never known until it has been cut. Once cut successfully, its value can increase a thousand times. It's easy to understand why the owner of Joker's diamond went to the best diamond cutter he knew, Kaplan. The cutter studied the diamond for twelve whole months. When he felt he was ready to start work, he discovered a flaw   . He had to begin his calculations all over again, or he might have made the stone useless. Six months passed, and Kaplan finally said to the owner, "I am ready to start my work. There will be one excellent diamond that will be comparable one excellent diamond of first-class quality    " Kaplan waited a few more days until he felt he was in the best physical and mental   condition  possible. He picked up his tools   and held his breath as he made the diamond exactly as he promised. Question: Kaplan studied the diamond for   _   . Yes or no, is the answer "more than one and a half years"?
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No

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Article: Most schools forbid chewing gum, but in a few years they might consider changing that rule. Why? Scientists are finding evidence that gum chewing may be good for your health. It may even help improve your test scores. This exciting research is just beginning. And in the meantime, companies are also experimenting with adding vitamins, minerals, medicines, and other substances that could give gum the power to cure headaches and fight everything from serious diseases to bad breath. Other researchers are finding that gum might work better than a pill to deliver medicines and other substances into the bloodstream. That's because the lining   of our cheeks can absorb certain substances more quickly than our stomachs and intestines   can. That discovery could help other researchers develop medicine-containing gums that fight colds, ease headaches, battle nervousness, and more. Scientists might even create antimicrobial   gums that cure bad breath. Those projects may take years, but gum scientists have already had at least one recent success: They've created a gum that could help us stay awake. Researchers have produced a gum called Stay Alert. Each stick has as much caffeine as a cup of coffee. It can take an hour for the caffeine in coffee to have its full effect, but the caffeine in Stay Alert _ in just a few minutes. The gum is easy to transport and it's stable in cold and hot climates. Unlike a pill, it doesn't require water to swallow. Those qualities make it easy for soldiers to use. For now, Stay Alert is available only to the military  . The manufacturer may one day offer it for sale to the public. People who work at night, such as truck drivers and medical personnel who ride in ambulances, might benefit from a product like Stay Alert. Question: The passage mainly talks about   _  . Yes or no, is the answer "new research on chewing gum"?
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Yes

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Article: The direction of our lives is determined by the choices we make every day. They accumulate  and lead to our final destination. Success in life is not a gift that just falls on people like a ripe pawpaw! It is a choice you have to make. The life you are going to live tomorrow is just a direct product of your choice today.    It is pointless to waste our time today and hope for a successful tomorrow. Everything that happens in your life depends on what you are doing today. Your future begins with a choice. Here are some tips that help you create a life of fulfillment and prosperity in the future. Choose to be positive. A positive mental attitude will put you miles ahead of your peers  . Never say never. Your attitude determines your altitude. It is more valuable than skills. Choose a positive attitude and things will start to work for you.  Choose to always treat others right. We come across all sorts of people, many of whom will treat us poorly. We can choose to treat them right, no matter how they treat us. When they lie, we will tell the truth. When they cheat, we will play by the rules. We may get the short end of the stick sometimes, but in the long run we will win.  Choose to sow more than you reap. There are many takers in this world, but our lives will be better as we become givers. Give away your time, your money and your love and you will most likely get it back sooner or later! Choose to break bad habit. Take the big ones first. Make every effort to break them. Forget about the others, as you will get to them later. Stop smoking, get out of debt and lose your extra weight. Exercise the power to choose!  Choose to get home for dinner more often. The family is the most important group of people you will ever belong to. Make a decision today to develop your relationship with your family. This one choice you will never regret.     You have a chance today to change your life forever. Make the right choices . Question: The purpose of writing this article is to   _   . Yes or no, is the answer "offer some tips on making choices"?
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assistant: No