How to write a composition that can't spit everywhere?

One morning, Xiaoming and Xiaohong were talking and laughing on their way to school.

Suddenly, they saw an oncoming uncle spitting on the side of the road. Xiaoming and Xiaohong hurried up to him and said, "Uncle, please don't spit everywhere!" " ! Hearing this, my uncle said disapprovingly, "What's the fuss about spitting?" Xiaohong said: "Our teacher said that spitting is not only an uncivilized behavior, but also an unsanitary behavior, which will spread diseases. Therefore, for the sake of the cleanliness of this city and everyone's health, please correct the bad habit of spitting. " Xiaoming also pointed to a sign on the wall that read "Develop a good habit of not spitting": "It is everyone's responsibility to develop a good habit of not spitting, which not only reflects our public morality, but also reflects the image of a city". Hearing this, my uncle took out a tissue from his pocket in shame and squatted down to wipe the sputum on the ground.

Xiao Ming and Xiao Hong saw it and said happily to their uncle, "Thank you for your cooperation"!