(单选题)

What will happen to a plant when exposed to too much sunlight?

A.Slowing down its leave growth.

B.Folding up its leaves.

C.Turning on its protective system.

D.Stopping taking in energy.

参考答案：C

参考解析：

细节理解题。该题可定位到第三段第二句“Normally, this system is activated when a plant gets too much sunlight, said scientist Krishna Niyogi.”从该句可知，当植物接触过多阳光时，保护系统就会启动。该句中的activate和C项中的turn on属于同义替换。故选C。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语