55. What is more important to an emotionally vulnerable person?

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?

27. In addition to the climate, the author thinks another major cause of India＇s water problem is(

26. What is the water problem facing one quarter of India＇s population?

25. What is the difference between the two camps in their suggested solutions to the water problem?

24. A remarkable period began in the 1970s when(

23. In the 1970s and 1980s, the Cuyahoga River fire had a positive effect of

22. What water crisis did the US have in the 1930s?

21. What is the good news about people＇s water use?