21. The largest of the racial and ethnic minorities in the U.S. is_____.
 A. the Indians                                                 B. the Japanese
 C. the Chinese                                                D. the Blacks
22. The place where Christopher Columbus landed was _____ .
 A. India                                                         B. the islands in Asia
 C. the current territory of America                    D. the islands in the now West Indies
23. The great international influence of _____is that the colonies in Spanish America rose up one after another to overthrow Spanish colonial rule.
 A. the American Civil War
 B. the Vietnam War
 C. the American War of Independence
 D. the Korean War
 24.In the early 1850s with the Westward Movement, the _____ issue became a serious political issue because it might tip the balance of power in the Senate.
A. slavery                                                      B. immigration
 C. territory                                                     D. Indian
25. Which of the following is NOT the main cause for the American government to declare war on Germany in the World War I?
 A. Germany refused to give up its submarine warfare.
 B. Germany tried to get Mexico into the war against the United States.
 C. Germany promised Mexico the return of lost territory of Texas.
 D. Japan launched the bombing of the Pearl Harbor.