2.(24511-!-item-!-188;#058&001020)
Organized in 1966 by the Fish and Wildlife Service, the Breeding Bird Survey uses annual roadside counts along established routes for monitoring of population changes of as many as, or of more than 250 bird species, including 180 songbirds.
(A) for monitoring of population changes of as many as, or of
(B) to monitor population changes of as many, or
(C) to monitor changes in the populations of
(D) that monitors population changes of
(E) that monitors changes in populations of as many as, or
我上来直接选的C，后来觉得改变了原句的意思，又选回了A，结果答案选C，难道可以改变意思？
23.(25773-!-item-!-188;#058&002128)
While they remove carbon dioxide from the air, conserve soil and water, and house thousands of species, forests also supply potentially valuable pharmaceuticals, and, as sources of building material and firewood, that provide employment for millions worldwide.
(A) pharmaceuticals, and, as sources of building material and firewood, that provide
(B) pharmaceuticals, and sources of building material and firewood, are providers of
(C) pharmaceuticals and, as sources of building material and firewood that are providing
(D) pharmaceuticals and sources of building material and firewood, for providing
(E) pharmaceuticals and, as sources of building material and firewood, provide
我选的D，觉得其他句子结构都有问题，答案选E，个人觉得E选项and前应该有逗号，求解
23.(25773-!-item-!-188;#058&002128)
While they remove carbon dioxide from the air, conserve soil and water, and house thousands of species, forests also supply potentially valuable pharmaceuticals, and, as sources of building material and firewood, that provide employment for millions worldwide.
(A) pharmaceuticals, and, as sources of building material and firewood, that provide
(B) pharmaceuticals, and sources of building material and firewood, are providers of
(C) pharmaceuticals and, as sources of building material and firewood that are providing
(D) pharmaceuticals and sources of building material and firewood, for providing
(E) pharmaceuticals and, as sources of building material and firewood, provide
我选的D，觉得其他句子结构都有问题，答案选E，个人觉得E选项and前应该有逗号，求解 | 
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发表于 2011-11-23 16:50:57
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