题目内容：

词语填空。用方框中所给单词的适当形式填空，使短文通顺、正确、连贯(每个单词限用一次)。

danger  high  other  hundred  also  foot  in  them  that  climb

 Some people say the 1.you climb, the harder you fall. Those people probably wouldn’t be rock climbers.

There are about nine million rock climbers in the United States. Some do it just for fun. 2.compete (竞赛). Rock climbing can be 3., but there are many ways 4.can protect climbers. They hope to challenge 5.through climbing.

There are several kinds of rock climbing. Traditional 6.is done outside. Climbers use ropes and equipment to climb many 7.of meters up. Sport climbing is similar. There is 8.indoor climbing. Rock walls made of wood or concrete(混凝土) have places for climbers’ hands and 9..

Nowadays, many American teenagers take part 10.the activity of rock climbing. It is a great way to build their confidence and strength.