In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Q: Article: Clothes can make phone calls, play music, dial your pal's number, keep you warm during cold weather and operate your computer? This is not a fantasy. A British company, called Electrotextiles, has created a wide range of clothes -- clothes that have minds of their own! Scientists, working for the company, have invented a kind of fabric that can be blended with flexible electronic materials to create intelligent clothing. The result are electronic garments. If you think the wearer has to be wired to different devices, think again. These designer clothes are wire-free, soft to touch and washable!! Like any electronic device, these high-tech clothes have to be powered. Currently, a tiny nine-volt battery serves the purpose. But the researchers hope that in the near future the clothes will generate electricity by using body heat. These clothes are 100 percent shock proof, they say. The Electrotextiles team has also created the world's first cloth keyboard. This keyboard can be sewn into your trousers or skirt. To use this device, you will have to sit down and tap on your lap! These 'lap- tap' gadgets are all set to take over laptop computers! Another useful garment is the shirt-cum-mobile phone. This handy invention enables drivers to chat comfortably with others at the wheel! Other popular electronic wear include the denim jacket with flexible earphones sewn into the hood and the electronic ski jacket with a built-in heater. The ski jacket is also programmed to send signals to a satellite. This technology is known as global positioning system and can be used to track lost skiers and wandering kids. Having completed the cloth keyboard, scientists have already started to work on a new project--a necktie that can be used as a computer mouse. What is the next? Do you have any idea?
Answer: they use electricity as power

A: . The electronic garments are similar to other electronic devices in that _ .
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Q: Article: In 1901, H.G. Wells, an English writer, wrote a book describing a trip to the moon. When the explorers landed on the moon, they discovered that the moon was full of underground cities. They expressed their surprise to the "moon people" they met. In turn, the "moon people" expressed their surprise. "Why," they asked, "are you traveling to outer space when you don't even use your inner space?" H.G. Wells could only imagine travel to the moon. In 1969, human beings really did land on the moon. People today know that there are no underground cities on the moon. However, the question that the "moon people" asked is still an interesting one. A growing number of scientists are seriously thinking about it. Underground systems are already in place. Many cities have underground car parks. In some cities, such as Tokyo, Seoul and Montreal, there are large underground shopping areas. The "Chunnel", a tunnel connecting England and France, is now complete. But what about underground cities? Japan's Taisei Corporation is designing a network of underground systems, called "Alice Cities." The designers imagine using surface space for public parks and using underground space for flats, offices, shopping, and so on. A solar dome would cover the whole city. Supporters of underground development say that building down rather than building up is a good way to use the earth's space. The surface, they say, can be used for farms, parks, gardens, and wilderness. H.G. Wells' "moon people" would agree. Would you?
Answer: lived in so many underground cities

A: The explorers in H. G. Wells' story were surprised to find that the "moon people" _ .
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Q: Article: World Car Free Day is a very important day on the environmental calendar. Every September 22, governments, green groups and ordinary citizens stress the damage cars are doing to the earth. The day is a reminder that we do not need to rely so much on cars. Those who take part in the activity hope that we all should realize we do not have to accept our car-controlled society. Carlos Pardo from Colombia's Sustainable Urban Transport Project said, "World Car Free Day is not only a celebration of fun ways to get around the city, but a demonstration of traffic-free streets and clean air is possible. But we do not want just one day of celebration and then a return to normal life. When people get out of their cars, they should stay out of their cars. It is up to us, our cities and our governments to help create lasting change to benefit walkers, cyclists and other people who do not drive cars. " Car-free days were organized as early as during the 1970s, and several car-free days were organized in European cities during the early 1990s. An international car-free day was organized in Europe in 1999. The European Union adopted the idea in 2000. Today, as many as 100 million people in over 1500 cities worldwide celebrate this day. World Car Free Day aims to take a large number of cars off the streets for all or part of a day. This will give people a chance to see what their town might look like with fewer cars. But some people say it is a one-day trick and does not make people give up their cars for the rest of the year. They say what is needed is a move towards a more sustainable city transportation system.
Answer: that tells us to refuse to drive any cars

A:
September 22 is a day _ .
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