B
Rock climbing became a sport in the 1900s. But now it becomes a popular sport. While rock climbing may still be necessary for mountain climbing, most people just climb low mountains for fun. If you try rock climbing, you will know that it is not a very easy sport. Indoor and outdoor rock climbing both need practice. Besides, your body and your will(意志) are very important for rock climbing. 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. And then, your arms should 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 will find more fun. If you like games such as playing chess, you may love rock climbing. They are nearly the same in the way of thinking. Rock climbing is also a good way to get yourself into shape. If you enjoy a difficult game and love outdoor activities, you should take up rock climbing as a new hobby.
()49. Where do you think this passage may come from?
A. A travel guide.
B. A history magazine.
C. A storybook.
D. A sports magazine.
()50. What can we learn from the passage?
A. Rock climbing is a very easy sport.
B. When you climb, your arms push you up.
C. Rock climbing is a kind of indoor and outdoor activity.
D. The closer you are to the rock face, the more difficult it is to climb.
()51. What is the best title of this passage?
A. Rock Climbing—A Wonderful Sport for You
B. Rock Climbing Improves Our Health
C. Practice Needed for Rock Climbing
D. Have Fun Playing Sports

49. D 【解析】文章出处题。根据“Rock climbing became a sport in the 1900s. But now it becomes a popular sport.”和全文内容可知，文章主要围绕攀岩这项运动展开，介绍了攀岩的历史、攀岩的技巧、好处等与运动相关的内容，最有可能来自体育杂志，故选D。
50. C 【解析】细节理解题。根据“Indoor and outdoor rock climbing both need practice.”可知，攀岩是一种室内和室外皆宜的活动，故选C。
51. A 【解析】标题归纳题。通读全文内容可知，文章介绍了攀岩作为一项运动的相关内容，包括它的发展、技巧、好处等，强调它是一项很棒的运动，适合喜欢有难度的运动和户外活动的人，A选项能准确概括文章内容，作为标题最佳，故选A。

【分析】
首先明确三道题的题型：49题是文章出处题，需通过全文核心内容判断来源；50题是细节理解题，需将选项与原文逐一比对；51题是标题归纳题，需总结全文主旨。解题时需先定位原文关键信息，再结合题型特点分析选项，排除错误答案，选出正确选项。
【解析】
49题：文章出处题。原文围绕攀岩这项运动展开，提及攀岩成为运动、流行运动、运动技巧、运动好处等内容，核心主题是运动相关，因此最可能来自体育杂志，故选D。
50题：细节理解题。A选项：原文提到“it is not a very easy sport”，与A矛盾，排除；B选项：原文指出“your legs are pushing you up”，而非arms，排除；C选项：对应原文“Indoor and outdoor rock climbing both need practice”，符合；D选项：原文说“The closer you are to the rock face, the easier it is to climb”，与D矛盾，排除，故选C。
51题：标题归纳题。全文介绍攀岩的发展、技巧、好处等，强调其是很棒的运动，适合喜欢有难度运动和户外活动的人。A选项“Rock Climbing—A Wonderful Sport for You”准确概括主旨；B选项仅提及健康好处，片面；C选项仅强调练习，片面；D选项范围过宽，未突出攀岩，故选A。
【答案】
49.D 50.C 51.A
【知识点】
文章出处题、细节理解题、标题归纳题
【点评】
本题为英语阅读理解典型题型，考查学生对文章细节的定位能力、主旨归纳能力及信息匹配能力，需掌握不同题型的解题技巧，如细节题的原文定位、标题题的主旨提炼等。
【难度系数】
0.8