科普说明(一)
Ⅰ.完形填空。
When we hear the word “geography”，we think of mountains，rivers and maps.But geography is __1__ than that.Geography is the world around us，wherever we are.
The longer people live in a place，the more they want to __2__ it.Then a town becomes a big city.Soon，smaller cities are __3__ on the outside of the big city.Then，there is a bigger area，with a(n) __4__ of hundreds of thousands of people.
