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

27. What does the author mean by "crossing these bridges" (Line 7, Para. 2)?

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

25. What solution does Rosen offer?

24. What has Rosen found in his experiments about students not allowed to use cellphones?

23. Larry Rosen advises other professors not to follow Duncan＇s lead because

22. What experiment did Duncan carry out to reduce cellphone use in class?

21. What is the finding reported in Doug Duncan＇s published paper?

30. THe author suggests at the end of the passage that India＇s Prime Minister should

29. What has the sand mafia done to make the water problem worse?

28. What do we learn about the report by the National Aeronautics and Space Administration?