Another source of knowledge is the vast store of traditional (传统的) practices handed down from father to son , or mother to daughter, of old country customs (习惯), of folklore (风俗). All this is very difficult for a college student to examine, for much knowledge and personal experience is needed here to separate good plants from wild grass. The college student should learn to realize and remember how much of real value science has found in this wide, confused wilderness and how often scientific discoveries of what had existed in this area long age.　

36.In the last paragraph the phrase "this wide, confused wilderness" refers to _____.
A. personal experience　B. wild weeds among good plants
C. the information from the parentsD. the vast store of traditional practices

37. Which of the following statements is supported by the passage?
A. The college students have trouble separating good plants from wild grass
B. Craftsman's experience is usually unscientific
C. The contemptuous (傲慢的) college students will receive nothing from craftsmen
D. Traditional practices are as important as experience for the college student

38. From this passage we can infer that ______.
A. we'll invite the craftsman to teach in the college
B. schools and books are not the only way to knowledge
C. scientific discoveries late based on personal experience
D. discoveries and rediscoveries are the most important source of knowledge for a college student

39. The author advises the college student to ______ .
A. be contemptuous to the craftsman
B. be patient in helping the craftsman with scientific terms
C. learn the craftsman's experience by judging it carefully
D. gain the craftsman's experience without rejection

40. The main idea of this passage is about ________.
A . what to learn from the parents B. how to gain knowledge
C. why to learn from craftsman D. how to deal with experience
　

B

    Water, water every where. It lasted almost two months , but in August it ended. It left 45 people dead and $10 billion worth of damage in nine states of USA. It was quite a big Mississippi flood ever recorded.

    In St.Louis, Missouri, 9,000 people were forced to leave their homes while the city was in danger. St. Louis is just downriver from the points where the Missouri and Illinois Rivers flow into the Mississippi. All three rivers were flooding. But the city escaped the worst when levees (堤) broke upriver. A levee is built of river sand and clay(粘土).

    Eleven miles of flood walls were built in the late 1960's The walls are 18 inches thick and 5 to 22 feet high. They were designed to protect against a 52-foot flood. In St. Louis, water almost reached the top of flood walls. It measured 49.4 feet.

41.The flood referred to in the passage _____.
A. was the heaviest one in the history　
B. happened in Missouri and Illinois states
C. happened in less than twenty percent of the states of U.S.A.
D. was recorded several times

42. The meaning of the sentence "But the city escaped the worst" is that _____.
A. many people escaped from the city　B. the flood attacked the city heavily
C. the flood did not attack the city at all D. the city avoided the worst situation

43. The highest flood referred to in the passage was about ______.
A. 18 feet high　B. 5-22 feet high C. nearly 50 feet high D. 52 feet high