The end of _______ finally brought freedom to the slaves in 1865, but blacks still had a lower position in society.
                    举一反三
- The first blacks were brought to north America as slaves in__1__.
 - The first blacks were brought to North America as slaves in ______. A: 1610 B: 1615 C: 1618 D: 1619
 - The first blacks were brought from to North America as slaves in 1619. A: South America B: Africa C: Central Africa D: Oceania
 - Like other blacks in the western hemisphere, the______majority of African Americans were brought to North America as slaves between the 1700s and the early 1800s. (overwhelm)
 - The fire was finally brought under control, but not ________ extensive damage had been caused.
 
