16. Paragraph➊17. Paragraph❷

18. Paragraph❸

19. Paragraph❹

20. Paragraph❺

A. Main Results of Recent Researches

B. Difference between Genetic and Observed Intelligence

C. Effect of Environment on Intelligence

D. Intelligence and Achievement

E. Impact on School Education

F. A Changed View of Intelligence

Sir Walter Raleigh sent some people to Virginia for a year in 1585.(  )

• A、Right

• B、Wrong
• C、Not mentioned

With John Cabot' s arrival at an island off the New England coast in 1497 ,the British Crown claimed to be the legal owner of North America.(  )

• A、Right
• B、Wrong
• C、Not mentioned