Food is important. Everyone needs to_______well if he or she wants to have a strong body. Our minds （心灵）also need a kind of food. This kind of food is_______. We begin to get knowledge(知识) even when we are young. Small children are_______in everything around them. They learn_______while they are watching and listening. When they are getting older they begin to _______story books, science books and anything else they like. When they find something new, they have to ask questions and_____to find out the answers.

What is the best______to get knowledge? If we learn_______ourselves, we will get the most knowledge. If we are_______getting answers from others and don’t ask why, we will never learn more and understand________.

Hong Kong has forty public beaches(海滩). Some of the beaches are among the best in the world. People can go there for a swim. You can go to most of them by bus. To go to some beaches you must take a boat. There are toilets, changing rooms and places to buy food and drink on most of the beaches.

You will swim there without danger（危险） if you remember these instructions（提示）: 1. Never swim alone. 2. Never swim after a meal or when you feel hungry or tired. 3. Do not stay in the water too long. 4. Never go out in a boat if you cannot swim.

Remember: A red flag（旗） means that it is dangerous for anybody to go into the water. A blue flag means that it is dangerous for children.