49. What do hard greens think about organic farming4

(A) Organic farming may help solve the problem of food shortage. 
(B) Organic farming is not efficient and may require more land to produce food. 
(C) More scientific research is needed to improve the technique of organic farming. 
(D) More effort should be made to help people understand the value of organic food.

45.(A)
regard (B) surface (C) perform (D) function

46. What does the term “hard greens” refer to4
(A) A group of mainstream environmentalists. (B) People who grow vegetables to save the earth. (C) Environmentalists who are against traditional ways of protecting the earth. (D) Farmers who organize international corporate farms for efficient food supply.

47. What do hard greens think about having people live in large cities and having them move to country homes4
(A) More people should move to the country in order to reduce pollution. (B) More people should move to the suburbs to plant fields of organic vegetables. (C) People should live in the cities so as to save cost on transportation and save energy. (D) People should live in the cities so forests and wild life in the country may be saved.

48. According to the passage, what place is suitable for widespread use of solar energy4
(A) Large cities with huge populations. (B) Sunshine states with plenty of trees. (C) River banks with vast areas of forests and wildlife. (D) Vast areas with very few trees and plenty of sunshine.

50. What do hard greens think about large agribusiness companies4
(A) They often control the market and result in rise of food prices. (B) They are able to produce more food on less land, and are thus more efficient. (C) Large agribusinesses tend to overuse pesticide, and thus should be inspected regularly. (D) Too many large agribusiness companies may lead to clearing of more forests for farmland.

Food costs more because more people are eating meat and milk products in ______ like China and India.
(A) economies (B) monuments (C) regulations (D) telescopes

Today 42 percent of those under 30 have college degrees—a ______ we expect will rise to half by 2010.
(A) proportion (B) resistance (C) stationery (D) terminal

After 40 years of separation from his identical ______, James Lewis began to search for his long-lost brother. (A)
loss (B) needle (C) owl (D) twin

Fire ants have been a problem ever since they came to the United States from South America. They have ______ across the South and now threaten various parts of the West as well.
(A) snacked (B) spread (C) squeezed (D) stripped

A new company has started to ______ computer parts. When old computers are received at the company, they are carefully broken down into parts and sold to different customers.
(A) calculate (B) glimpse (C) identify (D) recycle