*Question*
Article: Three kids have been learning chemistry for only a few months. But they have already begun to challenge a world famous scientist! Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator . They want it to take the place of litmus paper. "We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other." British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world. But when the kids did some experiments in class last winter, they saw that the litmus paper didn't turn very blue with base matter. It's hard to get a clear result. Will there be a better indicator than litmus paper? The three kids decided to try and find out! How? They went to collect over 40 plants in parks, gardens and markets. Then they ground leaves, flowers and stems to get the pigments from them. The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper! "It's our first scientific journey, Huang said, "But it makes me want to try harder." Question: What is widely used as the acid-base indicator now? Yes or no, is the answer "litmus paper"?
**Answer**
No

*Question*
Article: Do as the Romans Do The customs in different countries are rather different. If I have dinner with a Chinese host, he always puts more food onto my plates as soon as I have emptied it. That often discomforts me greatly. I have to eat the food even if I don't want to, because it is considered bad manners in the West to leave one's food on the plate. I have already noticed that when a Chinese sits at an American's dinner party, he very often refuses the offer of food or drink though he is in fact still hungry or thirsty. This might be good manners in China, but it is not in the West at all. In the United States, it is impolite to keep asking someone again and again or insist on his accepting something. Americans have a direct way of speaking. If they want something, they will ask for it. If not, they will say, "No, thanks." When an American is fed with beer by the host, for example, he might say, "No, thanks. I'll take some diet, Pepsi-Cola if you have it. "That is what an American will do. So when you go to the United States, you had better remember the famous saying: When in Rome, do as the Romans do. Question: Why does a Chinese often refuse the offer of food or drink at a dinner party? Yes or no, is the answer "He thinks it's polite to do that."?
**Answer**
No

*Question*
Article: Here are my three photos. This is my friend,Wu Huan.She is a good girl.She is 11 years old.She is in Chongqing with her family.She likes vegetables and chicken.She doesn't like ice cream or strawberries. This is me.My name is Chen Ming. I am 12 years old.I am a middle school student in Suzhou.I like eating fruit and vegetables. But I don't like eggs or carrots. This is my friend,too.His name is Doudou. He is in Suzhou with me. He likes bones( ). He doesn't like vegetables .He likes playing with balls. He is a nice dog! : Question: Doudou likes _ . Yes or no, is the answer "bones"?
**Answer**
No

*Question*
Article: Many children love to play with snow in winter. But Long Chuan has come to hate it. This year his hometown suffered from snowstorms for nearly a month. The heavy snow stopped cars and trains, broke the electricity tower and turned tap water to ice. Every day Long Chuan had to walk several kilometers to carry drinking water. "I couldn't ride a bike and it took me 3 hours to walk to school. I can't remember how many times I slipped on the hard ice, " said Long Chuan. Long is not alone. This year millions of people in central and southern China had a freezing winter without enough water and electricity. The biggest snowstorms in 50 years killed more than 100 people. They also cost the country 111.1 billion yuan. Experts say a special type of climate condition , La Nina, caused the storms. During a La Nina, the water in the Pacific Ocean near the equator becomes colder than usual. It changes the weather around the world. Besides China, Canada, the US and Middle Eastern countries also met with heavy snowstorms this winter. The special climate caused the recent flooding in Australia, too. However, experts say that people have destroyed the environment . Global warming may be causing these terrible weather events to happen more and more often. Question: What took place in Long Chuan's hometown last winter? Yes or no, is the answer "Heavy snowstorms."?
**Answer**
No