in his (A) original goal, the discoveries(B) hedid make were as(C) Important than the route to Asia he expected(D) to find.

17. Martha Graham, a (A)leading figure in modern dance, made she(B) debut in (C)1920 with(D) the Denishawn School.

18. In the United States, the federal government (A) is responsible to(B) regulating the working conditions(C) in factories(D).

19. Jupiter is(A) a gaseous planet with(B) an atmosphere composed most(C) of hydrogen and(D) helium.

20. Throughout her career(A) Georgia O'Keeffe paid(B) meticulous attention to her craft;her brushes were always(C) clean, her colors fresh and brightness(D).

21. Hydrogen the nine (A) most abundant element in the Earth's crust(B), is an(C) odorless, colorless, and tasteless(D) gas.

22. Salamanders are frequently (A) to be find(B) in moist(C), wooded(D) areas.

23. Steam engines have been replaced (A) in most(B) cases by(C) more economical and efficiency(D) devices, such as the electric motor.

24. Traditionally(A), the Fourth of July is celebrated(B) in the United States with political speeches, picnics, and most important of all(C), a displayed(D) of fireworks at night.

25. The style of used (A) in cartoon animation range from relatively(B) realistic representations of everyday life to the most romantic and impossible fantasy(D).

26. Ordinary(A) beaver dams vary(B)  in length from a few feet(C) to a hundred feel ormore than(D).

27. In the United State, presidential elections(A) are held(B) once every(C) four year(D).

28.Except of (A) the freehand toe, the feet(B) of the(C) gull are fully(D) webbed.

29. Teaching machines are devices that can store instructionally(A) information,present displays, receive(B) responses from a learner(C), and act on those(D) responses.

30. Challotte Perkins Gilman Is known primarily (A) as an author of short(B) stories, but she also wrote an influential book argued(C) for equal(D) economic opportunities for women.

31. In some areas(A) of the United States, unfavorable climate or(B) soil make farming(C)an impossible(D) task.

32. Naturalists have identified(A) at least four hundred of species(B) of mammals andsix hundred types of birds(C) in the state of(D) California.

33. Instead of tooth(A), the blue whale has a row(B) of bony plates in its(C) mouththat functions as(D) a food-collecting device.

34. Murres are black-and-white driving(A) birds that mate every five or six years and lay(B) only a single(C) egg at time(D).

35. A bar code consists(A) a pattern of lines(B) and bars that(C) a computer can translateinto information(D).

36. Hummingbirds are(A) the only(B) birds(C) that can fly to backwards(D).

37. Fluorine, a greenish-yellow gas that is slightly heavy(A) than air is poisonous(B)and corrosive and has a penetrating and disagreeable(D) odor.

38. The Everglades, a large swamp area(A) is an(B) unique wilderness(C) extending over much(D) of southern Florida.

39. Each year(A) millions of tons(B) of fertile topsoil that could(C) produce good crops washed(D) away by rains.

40. Since