2. _______ is the capital and economic center of the United States.
举一反三
- The Midwestern States Region is a vast area of generally flat land that covers much of the center of the United States.
- There are _____ states in the United States.
- 'Columbus is the capital of the United States.' is an example of:
- 1. Washington, D.C., is the capital of the United States.
- The Constitution of the United States of America is the Supreme law of the United States.