It is the duty of every citizen to honor the national flag. Why？Because the national flag is the symbol of a（the）country. To respect it means to respect the country. In other words，if a man loves his country，he must love the national flag. In school，the national flag is usually raised at a certain time every day. Then the principal，teachers，staff and students are to（must）stand before it and sing the national anthem. It is indeed extremely meaningful to attend such a ceremony.