16. Paragraph?17. Paragraph?

18. Paragraph?

19. Paragraph?

20. Paragraph?

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

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

There is not much the airlines can do when it comes to      (  ).

• A、making sure. the departures are not delayed
• B、the efficient handing procedure
• C、speeding up customs procedure
• D、the improvement of the condition of waiting lounges