I：阅读理解：阅读下列各短文，从题中所给的A,B,C,D四个选项中选出最佳选项.
（共10小题，每小题2分，满分20分）
A
Everyone knows that grains of sand can be grouped together to form a pagoda. In the same way, wealth starts with a goal saving a dollar at a time, which we call the piggy bank strategy. There are lessons in that time-honored coin-saving container.
