Rock climbing(攀岩) did not become a sport until late in the 1900s. But now it has become a popular outdoor activity. While rock climbing may still be necessary for mountain climbing, most people just climb low mountains for fun.
If you have ever done rock climbing, you will know that it is not a very easy sport. Indoor and outdoor rock climbing both need practice. What most people don’ t know is that rock climbing is one of the sports that depend on your body and mind(意志).
To climb successfully, one must use wonderful skills. One of the important rules is to always have three parts of your body on the rock face. Another important rule is that your arms only hold you close to the rock face while your legs are pushing you up, the closer you are to the rock face, the easier it is to climb.
Rock climbing is a wonderful sport. Once you start to learn how to climb, you'll find more fun. People who like games such as chess playing or problem-solving may love rock climbing, because they are nearly the same in the way of thinking. For anyone who wants to get into beautiful shape, rock climbing is a fun and good way. Anyone who enjoys a difficult game and loves the outdoors should think of taking rock climbing as a new hobby.
【小题1】 When did rock climbing become a sport?       

—I hear Millie is _________ in playing badminton than going roller skating.

—I don’t think so. She’s just come first in the school badminton competition.

根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限填一词。

      Many people say dolphins are very intelligent (聪颖的). They seem to be able to think, understand, and learn things quickly. But are they c   1.    like humans or more like cats or dogs? Scientists say dolphin intelligence is s   2.    to human intelligence in some ways. How?

      Like humans, every dolphin has a “name”. I   3.     is a special whistle (哨声). Scientists think dolphins, like people. “t   4.   ” to each other about a lot of things, such as their age, their feelings, or finding food. And, like humans, dolphins use a system (系统) of sounds and body language to c   5.   . But understanding their conversations is not easy for humans. No one “speaks dolphin” yet, but some scientists are trying to learn.

      Dolphins are also social animals. They live in groups, and they often come to play games from different groups and have f  6.    , just like people. In fact, playing t  7.    is something only intelligent animals do.

      Dolphins and humans b   8.     make plans to get something they want. In the seas of southern Brazil, dolphins use an interesting way to get food. When fish are n   9.    a boat, dolphins signal (发信号) to the fishermen to put their nets (网) in the water. And the men can catch a lot of fish. What is the advantage for the dolphins? Why do they h   10.    the men? The dolphins can get some of the fish.