阅读理解
Recently, an Internet game has become a new fashion among young office workers and students. People can “farm” on a piece of “land” and “grow”, “sell” or even “steal” “vegetables”, “flowers” and “fruits” on the Net. They can earn(挣) some e-money and buy more “seed”(种子), “pets” and even “houses”.
Li You from Xi'an said people in the city get tired from work, they go to their own farms, take care of their crops(庄稼), and pull out weeds(杂草). It is glad to forget about the pressure in cities.
Li Bu grew up in a small village, and then he went to a city, but now he misses the life in the village and “Happy Farms” makes the country dream possible in his office. He said every time he sees his crops, dogs, and grasses, he feels like he is in the village again. When he is working on his farm, he can feel the breath of nature, and get happiness from farming and harvesting(收获).
Li Lei enjoys putting some “bugs”(虫) in my friends' garden and they've become closer because of the game. Having fun together is the most exciting thing about it.
Li Hong said it was just a waste of time. Teenagers spend so many hours on it and they can't focus on their study.
被圆 
截得的弦长为（ ）