请仔细观察下面的图片,并根据所给提示和要求写一篇短文.
提示:(1)What are the man and the woman doing?
(2)What should you do when you see people litter like this? Why?
要求:(1)短文须包括所有提示内容,可适当发挥.
(2)短文中不要出现真实的地名、校名和人名.
(3)词数80个左右(开头已给出,不计入总词数).
参考词汇:throw, environment, civilized(文明的)
I can see a man and a woman in the picture. The man is