44. What is the main idea of this passage?
(A) Geoengineers are taking the step to build a large sun-shade.
(B) We do not have much time for geoengineering debate.
(C) The debate over whether humans can possibly take control over climate change.
(D) Global warming can be monitored.
(E) Planetary sunshade construction is a cutting-edge technology.

40. If you looked in the articles of the rights of men, you would have found your efforts superseded, because without equality, liberty cannot exist. (A) looked (B) the rights of men(C) efforts superseded(D) without equality(E) cannot exist

41. In the first paragraph, the word “procrastination” means ______. (A) discrepancy (B) affiliation (C) carelessness (D) dilatoriness (E) paralysis

42. According to the passage, there are many explanations provided by psychologists on why people procrastinate. Which of the followings is not one of them? (A) lack of confidence (B) depression (C) diligence (D) lack of self-control (E) low spirit

43. According to the passage, we find ______. (A) people cannot deal with abstract task (B) people are more likely to finish their task when they are well-paid (C) it is nature to malinger (D) people are more likely to finish concrete task than abstract one (E) difficulties often prompt people to take the challenge

45. The tone of the narrator could be described as ______. (A) energetic (B) incredible (C) pessimistic (D) ironic (E) concerned

46. Which is the best title for the essay above? (A) Spinal Cord Injury: New Drug (B) Spinal Cord Injury: Hope Through Research (C) New Medical Resources (D) How are Spinal Cord Injuries Classified (E) What Happens When the Spinal Cord Is Injured

47. According to the essay above, which answer is correct? (A) Scientists expect further development of spinal nerve regeneration in the future. (B) Most spinal injured survivors are female. (C) Doctors and scientists have found a solution for serious spinal cord injury. (D) Women would get injured easily. (E) Repositioning the spine remains the most difficult problem.

48. Several new surgical techniques will contribute to spinal cord injury survivors, but which technology is NOT discussed in the essay? (A) spinal nerve regeneration (B) neuroprotection (C) neurorehabilitation (D) cell replacement (E) heart bracket valve and implanting device

49. Which statement is correct? (A)Doctors use antibiotics to treat infection problems for spinal cord injury survivors. (B)Most cases of spinal cord injuries result from violence. (C)Before World War II, scientist found special cure for spinal cord injury. (D)A lot of survivors of spinal cord injury do not need to use wheelchair after one year’s treatment. (E)Treating spinal cord injuries, most doctors do not suggest antibiotics to avoid drug resistance.

50. What does it mean by chronic paralysis? (A) Loss or impairment of motor function of body for a long time. (B) Loss of feeling of sympathy in a long term. (C) Tentative loss of muscle function. (D) Loss of auditory function. (E) Loss of life.