Please list the six major national legal holidays in the United States.
举一反三
- There are 50 stars on the national flag of the United States. They represent today's 50 States of the United States.
- There are _____ states in the United States.
- The Constitution of the United States of America is the Supreme law of the United States.
- The national flag of the United States is .
- ______ is a common national personification of the American government or the United States.