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: Recent research has claimed that an excess of positive ions in the air can have an ill effect on people's physical or psychological health. What are positive ions? Well, the air is full of ions, electrically charged particles, and generally there is a rough balance between the positive and the negative charged. But sometimes this balance becomes disturbed and a larger proportion of positive ions are found. This happens naturally before thunderstorm, earthquakes when winds are blowing in certain countries. Or it can be caused by a build-up of static electricity indoors from carpets or clothing, or from TV sets, duplicators or computer display screens. When a large number of positive ions are present in the air many people experience unpleasant effects such as headaches, fatigue , excessive anger, and some particularly sensitive people feel sick or even suffer mental disturbance. Animals are also affected, particularly before earthquakes, snakes have been observed to come out, rats to flee from their burrows, dogs howl and cats jump about unaccountably. This has led the US Geographical Survey to fund a network of volunteers to watch animals in an effort to foresee such disasters before they hit vulnerable areas such as California. Conversely, when large numbers of negative ions are present, then people have a feeling of well-being. Natural conditions that produce these large amounts are near the sea, close to waterfalls or fountains, or in any place where water is sprayed, or forms a spray. This probably accounts for the beneficial effect of a holiday by the sea, or in the mountains with streams or waterfalls. To increase the supply of negative ions indoors, some scientists recommend the use of ionisers. They claim that ionisers not only clean and refresh the air but also improve the health of people sensitive to excess positive ions. Of course, there are the detractors, other scientists, who dismiss such claims and are skeptical about negative/positive ion research. Therefore people can only make up their own minds by observing the effects on themselves, or on others, of a negative rich or poor environment. After all it is debatable whether depending on seismic readings to anticipate earthquakes is more effective than watching the cat.
Answer: It's a charged particle.
What is an ion according to the passage?

Article: People go fishing for many reasons, for one they like the sport of it, reeling in the big catch after a long day of work or just having a few drinks on the water with some friends and letting all the stress just go. Whatever the reasons may be, it is absolutely _ . People in the south sometimes do a strange type of fishing where they reach their arm inside a hole in the bank and pull out cat fish the size of a boat. There is one form called jug fishing where you get a milk jug or water jug and tie a heavy fishing line with a big hook, put on a small brim and throw it in the water. The next morning you get up and see what's on the hook. There is fly fishing which is with a lighter string and top water jigs such as bugs that lay on the top of the water until the trout comes and takes it. It takes longer to reel them in because the line is so light and the fish are heavy. Ice fishing is a dangerous kind of fishing in the north. You cut a hole in the ice, drop in your bait and wait for a fish to bite. You have to be careful that the fish doesn't pull your line into the side of the ice and snap it. That is one problem with ice fishing but the fish are usually bigger and worth the trouble. Going out on the lake with a couple of friends or alone with a couple of drinks and a fishing pole can be the most stress releasing thing you can do sometimes. Just to feel the waves rocking the boat and a good conversation is all the therapy you will need sometimes. Catching a fish is always a great bonus .
Answer: Five
How many ways of fishing have been introduced in the passage?

Article: "I love the music-player function of 3G cellphones, " Xiaomei, a Chinese senior high school girl living in Japan, said happily. "Recently, I logged on to a website and downloaded some new Japanese songs with lyrics onto my 3G cellphone, "the girl said. "You know, it's amazing! Just like with KTV, _ 's voice can be switched-off leaving just the background music and lyrics. When no one is around, I practise singing songs like crazy. " Xiaomei's 3G cellphone almost made her a super star among her classmates. 3G was first introduced into Japan in 2001. After a slow start, it's now widely used there. High school students top the list of user groups, according to a major service provider in Japan. After years of effort, China is finally catching up. In January, China issued a 3G license to three operators--China Mobile, China Telecom and China Unicom. In 2009, the operators announced plans to expand the use of 3G cellphones. What is 3G? 3G wireless networks give users faster Internet connections. The Internet connection speed of 3G can be up to 15 to 20 times faster. This allows music and games to be downloaded more easily. E-mail can also be accessed faster. It has made watching movies and video-conferencing possible on a mobile phone. How do I use 3G? First, you must have a 3G cellphone. This year, products made by different cellphone companies will gradually appear in the marketplace. China Mobile and China Telecom users can continue using their old phone number and SIM card. China Unicom, however, has not yet decided on this matter. How much does it cost? The three operators have said that 3G fees will be similar, or slightly lower than today's 2G cellphones. According to a 3G student package, calls within the China Mobile network will cost 0.13 yuan per minute, while the fees go up to 0.23yuan per minute for calls between China Mobile and other networks.
Answer: It is thought that in Japan high school students use 3G the most.
According to the passage, which of the following statements is TRUE?