1. In 1780, 3,000,000 Americans were descended from immigrants of England and northern Ireland.

　　2. The new government of the United States was founded in 1789.

　　3. The 1929 amendment merely served to restrict immigration to the U. S. .

　　4. The years from 1861 to 1917 witnessed a need for immigrants as workers in industry and laborers from railroad construction.

　　5. The restriction of immigration to the U. S. was one of the factors leading to the economic depression of the 1930s.

　　6. The depression of the 1930s was dealt with by permitting immigrants who could contribute to the development and progress of the nation.

　　7. In 1929, only a little more than 150,000 foreigners migrated to the U. S. .

　　8. Between 1931 and 1940 only______people emigrated to the U. S. .

　　9. Since 1953 the immigration law has become increasingly

　　10. In the 1880s Americans were concerned that immigrants were likely to become

　　答案：1. Y 2. Y 3. N 4. Y 5. N 6. NG 7. N 8. 528,431 9. liberalized 10. public charges