Article: Penguins are lovely animals. Most people like them. But now as many as 10 of the 17 kinds of penguins are in danger of disappearing. The number of penguins has decreased by ( ) 30% since 1987. Penguins are black and white birds that live in the southern part of the world. They are common in the Antarctic Continent ,New Zealand, Australia and South America. Many live near cold waters . But some live near warm waters in Galapagos Islands. Penguins cannot fly, but they are fine swimmers. The shape of their body helps them to survive. Penguins eat fish and krill . They have short wings that help them to dive up to 900 feet to catch larger fish. They can swim 10-15 kilometers an hour which lets them protect themselves. They also have lots of body oil that helps in keeping them dry in the water. The warming of the earth is the reason for the decrease in the number of penguins. The hotter and hotter air has caused ocean waters to become warmer. Higher water temperature has decreased the fish and krill. Some years later these birds are completely unable toreproduce. And many adult penguins die of hunger. Too much fishing, exploration for oil and oil leaks also make penguins be in danger. Poisonous things in ocean waters are another danger. Penguins also have their enemies, including sharks, seals and sea lions. Question: What's the passage mainly about? Yes or no, is the answer "The decrease in the number of penguins."?
Yes

Article: Once a boy often made trouble. His mother gave him many nails . She told him to hammer(,)one in the garden fence every time he lost his patience and fought with someone. The first day he hammered 27 nails. In the following weeks he learned how to control himself better and the number of nails hammered became smaller and smaller. He learned it was easier to control himself than to hammer nails. The day finally came when he didn't hammer any nails. He went to tell his mother about it. Then his mother told him to pull off a nail from the fence each time he didn't lose his patience. After some days he told his mother that all the nails had been pulled off, so she took him to the fence and said to him, "You've behaved well, but look at all the holes in the fence. The fence will never be again like it was before. When you fight with someone, you leave wounds in him like these. The trouble may be over, but the wounds will always be there." So, learn to control yourself before you hammer the nail in the fence. Try not to leave any holes in your past. Question: The writer wants us to _ . Yes or no, is the answer "learn to control ourselves"?
Yes

Article: Jack is an English boy. He is a good student. He is eleven. Now he is in a blue coat. Linda is Jack's sister. She is a nice girl. She is fourteen. Now she is in a green dress. Lucy and Lily are from the USA. They are students, too. They are in yellow coats. They look the same. Jack, Linda, Lucy and Lily are good friends. Jack, Lucy and Lily are in the same school. But Linda is not in the school. They all like China. ,. Question: Jack, Linda, Lucy and Lily are _ . Yes or no, is the answer "good friends"?
Yes

Article: One day Mr Brown sees a young woman with several children in the street. He is very surprised because all the children are wearing the same clothes. White caps, blue coats and yellow trousers. "Are all these children yours?" he asks the woman. "Yes, they are," she answers. "Do you always dress them in the same clothes? " asks Mr Brown. "Yes," answers the mother. "When we have four children, we dress them in the same clothes because we don't want to lose any of them. It is easy to see our children among other children because they are all wearing the same clothes. And now we have ten, we dress them like this because we don't want to take other children home by mistake . When there are other children among ours, it is easy to see them because their clothes are different." Question: Mr Brown is surprised that _ . Yes or no, is the answer "all the children are in the same clothes"?
No