WHAT IS THE MAIN TOPIC OF THE PASSAGE
31. What is the main topic of the passage?
A. Teaching of astronomy in state universities
B. Stars on American coins
C. Colonial stamps and coins
D. The star as national symbol of the United States
31. What is the main topic of the passage?
A. Teaching of astronomy in state universities
B. Stars on American coins
C. Colonial stamps and coins
D. The star as national symbol of the United States