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Article: Most people buy a lot of gifts just before Christmas. But some people think we buy too much. They have started a special day called Buy Nothing Day. They don t want anyone to go shopping on that day. Buy Nothing Day is on November 29th. It is 25 days before Christmas. At that time, we see ads in newspapers and on TV telling us to "buy,buy, buy!" The idea for Buy Nothing Day started in Vancouver, British Columbia. Now people all over the world celebrate Buy Nothing Day. In California, USA, parents and children get together to read stories, sing songs and paint pictures. The children talk about why they don t need many toys. Last year, in Manchester, England, people dressed up in costumes to tell people that we buy too much. In Albuquerque, New Mexico,high school students wanted to tell other students about Buy Nothing Day. They organized a dinner to give people information about Buy Nothing Day. They asked restaurants in the neighbours to donate the food. They put up posters and talked to other students about it. The dinner was a big success, many students liked the idea of this new tradition. This year, they want to have another dinner to tell more people about Buy Nothing Day. Question: Buy Nothing Day started in _ . Yes or no, is the answer "Vancouver"?
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No

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Article: It is a fine Sunday morning .Ann and her mother are on a big bus .There are many people on it . Some of them come from America ,and some come from English and Canada. They are going to the Great Wall . There are only two Chinese on the bus .One is the woman .She is driving the bus .The other is a young man.He is their guide and can speak English very well. Now he is talking with an Ameican girl .Other people are listening to them .They are very interested in the Great Wall.They want to see it very much. Question: Ann is from _ Yes or no, is the answer "We don't know."?
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No

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Article: Bill Gates, the founder of Microsoft and one of the richest people in the world, is now making efforts to reinvent the toilet. Gates has donated a big part of his wealth to charity. Now his charitable organization, the Bill & Melinda Gates Foundation, is looking for future toilets that can improve the living conditions of millions of people. The flush toilet we use today was invented in 1775. While it works well in getting rid of our waste, it also uses a lot of water and needs a costly sewage system . Besides, it's not necessarily practical for the developing world. In some developing countries, lack of toilets leads to poor hygiene ,and _ could kill people. According to the World Health Organization, 1.5 million children under the age of five die each year because of hygiene problems. Last year, the Gates Foundation gave money to eight universities around the world and asked them to start inventing the toilet of tomorrow: a toilet that uses little or no water is cheap and easy to fix, and is safe and hygienic. At the " Reinvent the Toilet Fair " competition recently held in Seattle, twenty-eight designs were displayed. The winners, from the California Institute of Technology , were awarded a $ 100,000 prize by the Gates Foundation. "We couldn't be happier with the response that we've gotten," Bill Gates said at the event. Many of the new designs would not only greatly improve hygiene in the developing world, but also help change the dependence on traditional flush toilets in developed nations, he said. Question: How many designs were displayed at the "Reinvent the Toilet Fair"? Yes or no, is the answer "Twenty-eight."?
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No