全新版第二版综合B4U1(8)

A) to make their aim known to the world

B) to carry out violent actions

C) as an avenue of political expression

D) to condemn the adversary nations

正确答案： A

Passage Two

Questions 36 to 40 are based on the following passage.

As traditionally grown, under a canopy (株冠) of shade trees and amid other vegetation, coffee is an environmentally-friendly crop. The shade trees fix nitrogen in the soil, fostering the growth of the coffee bushes, and their fallen leaves provide nutrients, further reducing the need for chemical fertilizers. The mixture of vegetation prevents erosion and protects the coffee from harsh weather. In contrast to corn and cattle, which almost always require clear-cutting, coffee can be grown in relative harmony with the rain forest.

Recently, however, many coffee farmers in northern Latin America have reduced or eliminated shade to grow new high-yielding coffee plants under direct sun. Fear of a disease known as coffee leaf rust sparked an early round of conversions, most of which took place in the 1970s. To prevent the spread of the disease, coffee farmers "technified," replacing older, shade-loving coffee varieties, with new varieties, packed in tight hedgerows, that can survive open sun — but only with chemical inputs.

Coffee leaf rust never turned out to be a major problem for Latin America. To boost farmers' incomes, the U.S. Agency for International Development (USAID) spent some $80 million from the 1970s to the early 1990s, according to a report (1996) from the Smithsonian Migratory Bird Center and the Natural Resources Defense Council, to help growers in Central America and the Caribbean technify. In countries where USAID was not involved, national coffee federations promoted the change, supporting the technification of 69 percent of Colombia's coffee and nearly 40 percent of Costa Rica's.

36.

Growing coffee plants under shade ______.

A) helps them absorb oxygen from the soil

B) provides nutrients for other trees

C) reduces the need for chemical fertilizers

D) creates a mixture of vegetation

正确答案： C

37.

Coffee can be grown amid the rain forest because ______.