[解析]
(1)C 细节理解题.第根据文章第一段中"It's Denver's ongoing heat wave是丹佛持续的热浪'可知,是热浪影响了孩子们的专注.故正确答案为C项.
(2)B 推理判断题.根据第二段 "If you lose too much water,and you have to keep going to the water fountain,that can take away from their classroom experience"如果你失去了太多的水,你必须继续去喷泉,这会剥夺他们的课堂经验"可知,因为热,孩子们就会不断喝水,而不断喝水又会减少孩子上课的体验,进而影响他们的专注力;再结合第一段French teacher Tiffany Choi is already worried that her students are suffering from absent﹣mindedness.法国老师蒂芙妮•崔已经担心她的学生们心不在焉..'热浪使孩子们心不在焉"得出结论:热会降低孩子的学习能力.故正确答案为B项.
(3)C 推理判断题.根据最后一But unless significant changes occur in the next decade﹣which seem more and more unlikely﹣the world will be locked into an inescapable period of heat waves unlike our species has ever seen.但是除非在下一个十年里发生重大的变化,这种变化看起来越来越不可能发生,否则世界将陷入一个不可避免的热浪时期,这是我们人类从未见过的."可知,除非在未来十年发生重大变化,而这似乎越来越不可能;否则世界将陷入一个不可避兔的我们人类从没有遭遇过的热浪时期.即作者认为应对未来的全球变暖问题,人类是担忧的.故正确答案为C项.
(4)A 主旨大意题.从主题段落第一段The school year has barely started in Denver,and French teacher Tiffany Choi is already worried that her students are suffering from absent﹣mindedness.The problem isn't texting,playing video games or passing notes.It's Denver's ongoing heat wave丹佛的学年才刚刚开始,法国老师蒂芙妮•崔已经开始担心她的学生们心不在焉.问题不在于发短信、玩电子游戏或发短信.这是丹佛持续的热浪"可知,天气变暖形 成的热浪使得孩子们难以专注,所以短文的最佳标题为"气越热孩子们学得就越少"".故正确答案为A项.