阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

The first step of ice 【小题1】 (fish) is getting the net, which is usually over two kilometers long, ready to put under the ice. Then the workers will put the net down at a 【小题2】 (choose) spot, and take it up in the distance of the vast lake.

【小题3】 this is actually achieved is an interesting process. First up, a series of holes are drilled into the ice of about a meter and a half thick. They drill a hole every 50 meters or so and they’ll keep doing that until they’ve drilled the holes the entire way around a circle with a diameter (直径) of two kilometers. Meanwhile, another team gets to work, 【小题4】 (extend) the main hole using a 【小题5】 (tradition) ice pick. Eventually, a long piece of bamboo will 【小题6】 (employ) to thread the rope of the net into the next hole they have drilled 50 meters away. And these guys will continue like that around the entire outside of the circle until the rope 【小题7】 (reach) the other side of the circle two kilometers away. At the same time, back at the mother hole, the net is being lowered slowly 【小题8】 surely, meter by meter until it’s 【小题9】 (complete) submerged under the ice. In the distance, the diggers have reached the other side of the circle and are now working on digging the hole that the net will eventually come out 【小题10】.