But busy cities bring many problems to the e___________(9)cities是什么意思, e________(10) air pollution,water pollution and light pollution. Most people find out when they go into a citycities是什么意思, they will have a unhappy e________(11). The noise will make you bored, bright light from the glass window will make you feel very hot. The air in the city is not fresh like it in the country. And you can see waste things here and there. So E_________ (12) don’t like living in a city. They like living in the country. They e__________(13) that the country has e_________(14) environmental living conditions. They think everything is good e_________(15) work. Some scientist e_________(16) people to live in the country. They say that living in the country is good for people’s health.