26. The author thinks that after school teens should spend time(

49. What has Bill Thomas been persistently advocating?

48. What do we learn about Bill Thomas bringing animals and plants into the nursing home?

47. Why did Bill Thomas try something different in the nursing home?

46. What has Bill Thomas been doing for a quarter of a century?

55. What did the joint study find about the MOOCs several years ago?

54. What does the author say causes refugees＇ difficulty in taking online courses?

53. What does the passage say is a consequence of the global migrant crisis?

52. What do we know about "Coursera for Refugees"?

51. Why is the U.S. State Department launching an online learning program for refugees?

50. What is said about those working with or under overachieving people?