Question 7 is based on the news report you have just heard.

News Report Three

    Three university students in Santiago, Chile, have（5）developed a plant-powered device to charge their mobile phones. 

    The three engineering students（6）got the idea for the device while sitting in their school’s courtyard. Their invention is a small biological circuit they call E-Kaia. （7）It captures the energy which plants produce during photosynthesis—a process of converting sunlight into energy.

     A plant uses only a small part of the energy produced by that process. The rest goes into the soil. E-Kaia collects that energy. The device plugs into the ground and then into a mobile phone. 

    The E-Kaia solved two problems for the engineering students. They needed an idea for a class project. They also needed an outlet to plug in their phones. 

    One of the student inventors, Camila Rupcich, says the device changes the energy released from the plant into low-level power to charge phones. 

    The E-Kaia is able to fully recharge a mobile phone in less than two hours.

7. What does the speaker say about the invention?

解析：D。该题目为细节题。问题是：关于这项发明，叙述者说了什么？根据问题关键词较难定位，故可从选项入手。选项A“增加手机应用数量”和选项C“改善手机信号”并没有在文章中出现，B、D都有原文词“photosynthesis”和“released”。但是B 选项翻译为：加快光合作用进程。D 译为：搜集植物释放的能量。文章出处：It captures the energy which plants produce during photosynthesis—a process of converting sunlight into energy. 捕捉在光合作用中产生的能量。选项B为细节的拼凑，但是翻译出来与原文不符。D选项是原文的改写。其中，capture表示“捕捉”，collect表示“搜集”，两个词是同义替换。因此，此题目正确答案为D。