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  3. A national political struggle is continuing over the issue of protection for the remnants of vast ancient forests that once cove

A national political struggle is continuing over the issue of protection for the remnants of vast ancient forests that once cove

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问题     A national political struggle is continuing over the issue of protection for the remnants of vast ancient forests that once covered the northwestern areas of the United States. These old forests, called "old growth", 【S1】______ trees from 200 to 1,200 years old. There are now about 6 million acres of virgin forest in Washington and Oregon, only about one-tenth of what existed before the 1800s. This old growth contains some of the most 【S2】______ timber in the nation, but its economic worth is also contained in its water, wildlife, scenery and 【S3】______ facilities.
    Conservationists want the 【S4】______ of existing old growth protected from harvesting. They emphasize the vital relationship between old growth and the health of the forest’s ecosystem. They cite studies and show that both 【S5】______ and standing old trees store and release nutrients 【S6】______ to younger trees.
    On the other hand, much of the Northwest’s economy is developed around the logging 【S7】______ . Trees are cut down to make wood products, and many mills are geared for old-growth industry. In recent years, 5000 acres of old growth have been logged, 【S8】______ trees up to 500 years old and eight feet in 【S9】______ . Although the U.S. Forest Service wrestles with the problem of how much of the forest to save, the harvesting of timber 【S10】______ . The district office refuses to remove any of the old growth from timber production. The struggle is continuing at the national level, with strong proponents on both sides.

A) majority        B) valuable          C) vast            D) downed
E) continues       F) wanted            G) contain         H) evidence
I) diameter        J) result            K) including       L) industry
M) hoping          N) recreational      O) necessary
【S5】
选项
答案D
解析
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