In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.

Article: Three men were travelling across the desert when their car broke down. There were no other traffics, so their only hope was to walk. Before they set off, they looked around in the car for useful things to take with them. One of the men took a bottle of whisky. Another took an umbrella. The third unscrewed a door from the car and carried that. After they had been walking for almost a day, they came across a camel caravan travelling towards them. "Let's try to join the caravan," one of the men said. "It's going the wrong way but we'll be safer than if we keep on alone across the desert." The other s agreed, so they asked the leader of the caravan for permission to join it. "You can join the caravan only if you answer three questions," he said. He pointed to the first man's bottle. "What is that and why are you carrying it?" he asked. "It's a bottle of whisky. I decided to carry it with me so that if I feel miserable and want to give up, I can get drunk, cheer myself up and then keep on walking." "Very sensible," the leader of the caravan said. Then he pointed to the next man and his umbrella. "It hasn't rained in the desert for many years," he said. "Why are you carrying an umbrella?" "I don't want to get heat exhaustion," he replied. "The umbrella will give me shade from the sun." "Very sensible," the leader of the caravan said. He pointed to the third man and his car door. "And why are you carrying a car door?" he asked him. "I thought that if I got too hot I could open the window and let some air in," he explained.
Answer: They exchanged it for another one.
What happened to the three men's car?

Article: When 18th-century scientists first came across Australia's platypus , they thought it was a trick. It is not surprising that the platypus made people confused. This funny-looking animal has feet and is a kind of warm-blooded mammal. While other mammals usually keep their blood at around 37 degrees, the platypus has a lower body temperature of 32 degrees. As to its appearance, the platypus'mouth is not really like ducks'at all; its mouth actually looks a bit soft. The platypus closes its eyes when swimming. It uses its mouth to pick up outside information made by the creatures underwater. Strangest of all, the platypus is a mammal that can lay eggs. And there is only one other kind of mammal that can lay eggs, the echidna of Australia. Both the platy-pus and the echidna lay soft-shelled eggs, and both feed their young with their own milk that comes out of their skin. These animals also walk in a way that is similar to crocodiles , with legs on the sides of their bodies rather than under them. Though pretty, in a special way, the platypus is actually one of the few mammals that are poisonous. A male platypus has knife-like bones on its back legs which have enough poison to kill a dog. The platypus has the honor of being one of the oldest mammals in the world. Until the early 20th century, it was hunted for its fur, but the situation has changed. Although the platypus is easily affected by pollution, it is not under any immediate threat.
Answer: It has a lower body temperature than other mammals.
What can we learn about the platypus according to the text?

Article: Family traditions were important in our house, and none was more appreciated than the perfect Christmas tree "Dad, can we watch when you trim the tree?" My eldest son. Dan, nine, and his seven -year-old brother John, asked "I won't be cutting this year," my husband Bob said. "Dan, you and John are old enough to measure things. Do it all by yourselves. Think you boys can handle it? Dan and John seemed to _ in their chairs at the thought of such an amazing responsibility. "We can handle it." Dan promised. "We won't let you down." . A few days before Christmas. Dan and John rushed in after school. They gathered the tools they'd need and brought them out to the yard .where the tree waited. I was cooking when I heard the happy sounds as the boys carried the tree into the lying room. Then I heard the sound that every mother knows is trouble: dead silence I hurried out to them. The tree was cut too short. John crossed his arms tight across his chest. His eyes filled with angry tears. I felt worried The tree was central to our holiday. I didn't want the boys to feel ashamed every tune they looked at it. I couldn't lower the ceiling, and I couldn't raise the floor either. There was no way to undo the damage done. Suddenly, a thought came to my mind, which turned the problem into the solution. www..com "We can't make the tree taller." I said. "But we can put it on a higher position" Dan nodded his head sideways. "We could put it on the coffee table. It just might work! Let's try it!" When Bob got home and looked at the big tree on top of the coffee table, Dan and John held their breath. "What a good idea!" he declared "Why didn't I ever think of such a thing?" John broke into a grin Dan's chest swelled with pride.
Answer: The whole family
Who trimmed the Christmas tree this year?