Singapore is an English-speaking country. Most of the slogans in public places in this country are written in English, but some are polite.

(1) Spitting and littering pollute the environment and affect people's health, which is not only a sign of their low quality, but also does not meet the requirements of civilization and courtesy.

(2) "ellipsis" (just answer with the actual answer)

(3) Politeness reflects our own quality, shows our elegant demeanor and shows respect for others. Politeness not only indicates whether a person has moral cultivation, but also affects the interpersonal relationship and social atmosphere, and also relates to the dignity of the country and the nation. (3) The impolite behavior of some China people abroad has defiled China, and the overall quality of China people needs to be improved.