2 . 阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
There are many water sports that are fun. Kitesurfing, a young water sport, 1 (begin) in the 1980s, but didn’t get popular until the end of last century. Also, in some European countries it 2 (call) flysurfing, which works through wind power 3 using a large kite to pull a rider on the water at high speed.
At the beginning, the sport was difficult and dangerous. Now it is becoming simpler and safer because of the safer kite design. For an able and strong person, it can be a very fun and 4 (extreme) exciting sport, just like 5 (skate) on the water with a feeling of flying. It has become more and more popular.
Luckily, it is 6 (easy) to learn than other water sports. A beginner can understand how 7 (operate) the kite with 5-10 hours of training. And anybody aged from 13 to 65 can learn. It is not expensive to get the equipment for the sport, which costs $1,000 to 82,500. Training lessons range from $200 to $500 for two or three hours.
8 the equipment progress develops, the sport is becoming even safer. After some training, you can enjoy its challenging feeling, excitement and 9 (entertain). In China, Xiamen is the only place that has the kitebsurfing club, 10 provides professional training and equipment for the sport.
