Question 6 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.

6. When did they get the idea for the invention?

解析：A。该题目为细节题。问题是：他们在什么时候萌发了这个创意？根据问题关键词“idea”定位文章出处：The three engineering students got the idea for the device while sitting in their school’s courtyard.他们坐在学校操场上时萌发了用植物给手机充电的创意。选项A）While sitting in their schools courtyard，与原文内容视听一致。因此，此题目正确答案为A。