42.
(A) necessity
(B) necessary
(C) necessarily
(D) necessaries

38. (A) Slow early childhood development (B) Slowing early childhood development (C) To slow early childhood development (D) It slows early childhood development

39. (A) only (B) early (C) first (D) one 

40. (A) am (B) was become (C) have been (D) had been

41. (A) not to mention (B) last but not least (C) on the other hand (D) by no means

43. (A) after (B) later (C) latter (D) following 

44. Which of the following is true? (A) Students often write to Wales to express their appreciation and admiration. (B) Wales apologizes to college students when they complain about the inaccuracies in Wikipedia. (C) Wales wants to send professors a fact sheet to defend Wikipedia. (D) Wales thinks that, though Wikipedia is a good source of knowledge, it has limited use.

45. According to Wales, college students can consult Wikipedia when they ______. (A) write research papers (B) do class projects (C) look up quick facts (D) all of the above

46. What does "get into hot water" in the second paragraph probably mean? (A) get into trouble (B) get a high grade (C) need technical support (D) forget to do something

47. From the passage, we can infer that ______. (A) the children of some low income families, such as those in Newham, already enjoy free school meals (B) the existing plan started in September and has provided a total of 500,000 families with free school meals (C) the total cost of the old plan was two hundred million pounds (D) Labour thinks that the price tag of £200m for this kind of scheme is quite a bargain

48. "Labour" in the first paragraph means ______. (A) the working class (B) the labour movement (C) a labour camp (D) the British government formed by the Labour Party