The La Brea tarpits, located in Hancock Park in the Los Angeles area, have proven to be an
extremely fertile source of Ice Age fossils. Apparently, during the period of the Ice Age, the tarpits were
covered by shallow pools of water; when animals came there to drink, they got caught in the sticky tar
and perished. The tar not only trapped the animals, leading to the death, but also served as a remarkably
effective preservant, allowing near-perfect skeletons to remain hidden until the present era.
In 1906, the remains of a huge prehistoric bear discovered in the tarpits alerted archeologists to the
potential treasure lying within the tar. Since then thousands and thousands of well-preserved skeletons
have been uncovered, including the skeletons of camels, horses, wolves, tigers, sloths, and dinosaurs.
【題組】40. Which of the following is NOT mentioned as an example of a skeleton found in the tarpits?
(A) a snake
(B) a sloth
(C) a horse
(D) a bear