45. Which of the followings is NOT one of the reasons why humans can live longer?
(A) No biological limit.
(C) Public health.
(B) Food supplies.
(D) Sanitary condition.

41. Which of the followings is closest in meaning to the word "longevity" in the passage?(A) stable life(B) long life(C) afterlife(D) lifecycle

42. Which of the followings is closest in meaning to the word "flawed" in the passage?(A) fluctuating(B) insecure(C) unbalanced(D) imperfect

43. Why was Jeanne Calment mentioned?(A) Her age was not real.(B) She was the oldest in France.(C) She didn't reach a fixed life span limit.(D) She was the oldest human whose age was well-documented.

44. What can be inferred from the following statement?...people that old often lose track of how long they've actually lived.(A) People are lost if they get old.(B) It takes long to know the age.(C) They are too old to remember their ages.(D) It is difficult to find the age record of very old people.

46. The United States _________. If the problem is not addressed or most Americans are not aware of the nature of the problem, it will continue to worsen severely. Fire statistics show that the USA lags behind its peer nations in fire security. Each year, there are hundreds of fires, thousands of deaths, tens of thousands of injuries, and billions of dollars lost in the country. These figures far exceed comparable statistics for other industrialized countries.(A) organizes a long-term project(B) is under far-reaching change(C) has a disastrous fire problem(D) faces a national security challenge

47. Animals' sleeping habits _________. They differ according to what time of day they sleep. Some animals sleep during daylight hours while others sleep during darkness. They also differ in the length of time they sleep. Other animals sleep for weeks or months at a time when they sleep through the winter.(A) vary in a number of ways(B) create different ecological systems(C) change with their environment(D) develop with their surroundings

48. Fresh water is _________ in developing countries. More than one billion people still lack access to safe drinking water, about three billion do not have access to adequate sanitation services, and about two million deaths each year are traced to waterborne diseases. Thus, water there is especially costly or inaccessible to the poorest, while the rich there have it piped into their homes. In addition, because of the infrastructure used to control water, whole seas are being lost, rivers are running dry, or millions of people have been displaced to make room for dams to reserve water.(A) a serious distress(B) a limiting resource(C) a competitive advantage(D) an startling phenomenon

49. In order to be successful in academic study, college students need to _________ available in the university. One important resource that all college students should use is tutorial services. Another important resource is frequent use of the library. In addition to using tutoring services and the library, college students should consult with their advisor regularly to monitor their learning of disciplinary knowledge or professional skills.(A) develop academic skills(B) observe learning progress(C) utilize the resources(D) apply professional knowledge

50. Course requirements in university systems_________in different countries around the world. In most of the European universities, students are not required to attend classes. However, students in the United States are required to attend all classes and may be penalized if they do not. Besides, in the European system, students usually have to take one comprehensive examination at the end of the entire four or five years of study. But, there are usually numerous quizzes, assignments, or final papers in each course at the end of the semester in the university systems in the United States.(A) should be reformed drastically(B) will be transformed steadily(C) may reshape education comprehensively(D) can differ considerably

1. この絵を見て、どの運転手のバイク用ヘルメットのかぶり方 が｢正しい｣か？ (A) A (B) B (C) C