A
The year 2019 was a year of teen power.Young people spoke up about big problems and adults began to listen.Greta Thunberg, the seventeenyearold Swedish schoolgirl, was perhaps the most powerful example last year of this teen power.At the U．N.Climate Action Summit in September 2019, she told world leaders, “You are failing us young people” by not taking enough action against climate change.Greta gained worldwide attention for her impassioned (激昂的) speech and was named Time magazine's 2019 Person of the Year.
In the United States, teen groups have formed organizations to pressure politicians into changing gun laws to stop school shootings.“The adults know that we're cleaning up their mess，” says Cameron Kasky, an 11thgrader who started the Never Again movement after surviving the deadliest high school shooting in American history in 2018.“It's like they're saying, ‘I'm sorry I made this mess’， while continuing_to_spill_soda_on_the_floor，” adds another survivor Emma Gonzalez.
These problems are not new and politicians have been dealing with them for years.However, as with the most big problems, there are no easy solutions, and each solution may create more problems.Fighting climate change by reducing fossil fuels (化石燃料)—no more cars, airplanes or big industries—can have a negative effect on people's lives and even increase poverty.And prisons would fill up quickly if we locked up every person who was considered to be a potential criminal.
Teen power is a good thing.However, it will take more than youthful passion to solve the world's problems.If you are also ambitious to make the world a better place, it is important that you speak up when necessary.But just as important is the need to grow in our learning—to study and to always remain humble.Apart from enthusiasm for bringing about change, you still need the maturity, wisdom, knowledge and skills to make good decisions.
[语篇解读] 本文是一篇说明文。文章主要介绍了青少年参与政治活动，督促政府改进社会弊端，这是好的一面。但是，青少年不仅需要热情，更需要加强文化学习，提升自己的知识技能，才能更好地帮助解决世界上的各种问题。
1．Why does the author mention Greta Thunberg in Paragraph 1?
A．To show the success of teen power.
B．To inform readers of 2019 Person of the Year.
C．To introduce the U．N.Climate Action Summit.
D．To encourage readers to speak up about big problems.
解析：推理判断题。第一段第一句提到“The year 2019 was a year of teen power.(2019年是见证青少年力量的一年)”，接着作者提到Greta Thunberg在2019年的联合国气候行动峰会上的演讲，为她赢得了《时代》杂志的2019年年度人物。通过这个例子，证明了作者的观点“The year 2019 was a year of teen power.”，展示了青少年力量的成功。由此可知，作者在第一段提到Greta Thunberg是为了展示青少年力量的成功，故选A项。
答案：A
2．What does the underlined phrase in Paragraph 2 mean?
A．The adults like soda very much.
B．The adults fail to clean up their mess.
C．The politicians haven't stopped making a mess.
D．The politicians have been working on the shooting.
解析：句意猜测题。根据上文“The adults know that we're cleaning up their mess”可知，成年人在不断犯错，把一切都搞得一团糟，要靠青少年来帮着解决问题；再由画线部分所在句“I'm sorry I made this mess’， while continuing to spill soda on the floor”可推知，他们一方面承认自己的过错，但是另一方面又不知悔改，继续犯错。由此可知，画线部分意思是“政客们没有停止制造混乱”，故选C项。
答案：C
3．What is the author's opinion about reducing fossil fuels?
A．It makes no difference to people's life.
B．It will bring about other new problems.
C．It will make the prisons fill up quickly.
D．It is effective in fighting climate change.
解析：细节理解题。根据第三段中“However, as with the most big problems, there are no easy solutions, and each solution may create more problems.”可知，作者认为大部分的问题都没有简单的解决方案，每一种解决办法都带来新的问题。下文列举了一个例子，比如，为应对气候变化，可减少化石燃料的使用，但这又会导致交通工具的停运，对人们的生活产生负面影响，甚至加剧贫困。由此可知，作者认为减少化石燃料，将带来其他新问题。故选B项。
答案：B
4．What does the author want to stress in Paragraph 4?
A．Teen power is a good thing to change the world.
B．Passion is important in solving the world's problems.
C．We should speak up to make the world a better place.
D．We need to study to be mature and wise to decide well.
解析：推理判断题。根据最后一段内容尤其是最后一句“Apart from enthusiasm for bringing about change, you still need the maturity, wisdom, knowledge and skills to make good decisions.”可知，作者想强调青少年参与政治是很好的，但是要解决世界上的问题，不能光靠热情，还需要提升自己的素养和能力，需要加强学习才能更好地决策。由此可知，在第四段中，作者想强调我们需要学着成熟，并且明智地做决定。故选D项。
答案：D
