题目内容：

回答问题 阅读短文，然后根据短文内容, 简要回答下列问题。

Hong Kong has about forty public beaches. Some of the beaches are the best in the world. People can go there for a swim. You can go to most of them by bus, but if you want 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 can swim there without danger if you remember these instructions(指令).

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.

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

1.How many public beaches are there in Hong Kong?

2.How can you go to these beaches?

3.Can you swim when you feel hungry?

4.What does red flag mean?

5.Can you buy food and drink on the beaches?