填空题

A proverb is a short saying that gives advice. Proverbs are based on people’s experiences and often date back to the early days of a country. Every country has its own proverbs. You can learn a great deal about a country just from its proverbs. Proverbs take several forms. Sometimes proverbs may use animals or other non-human-being things to tell you something about life. And sometimes they just give a short piece of advice. But proverbs are always interesting sentences with a certain rhythm or an amusing play on words. They always contain some advice about how to live or some universal truths. Reading a proverb takes a special skill. The words seem very simple, but you have to think about the meaning behind the words. When you read a proverb, first try to understand what the words of the proverb say. Then try to figure out the real meaning behind the words.

What advice do proverbs contain（）