[B] demonstrate the cruelty of slavery in his days.

　　[C] stress the role of slaves in the U.S. history.

　　[D] reveal some unknown aspect of his life.

　　37. We may infer from the second paragraph that

　　[A] DNA technology has been widely applied to history research.

　　[B] in its early days the U.S. was confronted with delicate situations.

　　[C] historians deliberately made up some stories of Jefferson’s life.

　　[D] political compromises are easily found throughout the U.S. history.

　　38. What do we learn about Thomas Jefferson?

　　[A] His political view changed his attitude towards slavery.

　　[B] His status as a father made him free the child slaves.

　　[C] His attitude towards slavery was complex.

　　[D] His affair with a slave stained his prestige.

　　39. Which of the following is true according to the text?

　　[A] Some Founding Fathers benefit politically from slavery.

　　[B] Slaves in the old days did not have the right to vote.

　　[C] Slave owners usually had large savings accounts.

　　[D] Slavery wad regarded as a peculiar institution.