going up on trees or climbing tall ladders. With rock climbing, you can satisfy their urges to be a climber.

　　 What's more, it is fairly easy for the kids compared with adults. With a high strength­to­weight rate, they have less body weight to pull up, and they are more flexible.

　　 It is also a low­impact workout that tests your children's endurance (耐性). It's easy on their joints (关节) as they burn energy during their ascent. In addition, climbing walls are like giant puzzles begging to be solved. Not only does it test the physical aspects of your children's development, but it also wakes their mental abilities.

　　 This exercise also helps develop your children's essential strength and flexibility. Kids are challenged physically as they pull, lift, stretch, and twist their way up. This activity also develops their eye­hand coordination (协调) as they perform their climb.

　　 Almost anyone can do it although it may vary in skill level, namely beginner, intermediate, or advanced. But despite its reputation as an extreme sport, children can do this. One does not need to be super­fit to join a rock climbing class. However, good technique is more necessary than strength when doing this sport.

　　【文章大意】　 攀岩有助于提升孩子们很多方面的能力，是室外活动中一个不错的选择。攀岩对孩子到底有什么样的好处呢？

　　1. When it comes to climbing, compared with children, adults ________.

　　A．find it much easier

　　B．must bear more body weight

　　C．have a higher weight­to­strength rate

　　D．follow up more on their natural quality

　　解析：B'细节理解题。根据第三段With a high strength­to­weight rate, they have less body weight to pull up，and they are more flexible.可知，孩子的力量，重量比高一些。他们的体重较轻，更灵活，而与孩子相比，成人正相反。

　　2. The underlined word "ascent" in Paragraph 4 can be replaced by "________"．

　　A．test B．climb

C．challenge D．improvement