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124. Whereas the use of synthetic fertilizers has greatly expanded agricultural productivity in many parts of the world, an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers may accelerate soil structure deterioration and soil erosion.
(A) an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers
(D) the increased usage of these fertilizers can create serious environmental problems such as water pollution, while if substituted for more traditional fertilizers, this substitution
答案是A,我选D。 想问为啥D不行。
127. After decreasing steadily in the mid-1990's, the percentage of students in the United States who finished high school or earned equivalency diplomas increased in the last three years of the decade, to 86.5 percent in 2000 from 85.9 percent in 1999 and 84.8 percent in 1998.
这句是全句倒装吧？可以帮忙还原一下吗？
129. In addition to her work on the Miocene hominid fossil record, Mary Leakey contributed to archaeology through her discovery of the earliest direct evidence of hominid activity and through her painstaking documentation of East African cave paintings.
(A) Mary Leakey contributed to archaeology through her discovery of the earliest direct evidence of hominid activity and through her painstaking documentation of
(E) Mary Leakey's contributions to archaeology include her discovering the earliest direct evidence of hominid activity and painstaking documentation of
答案是A。前面不是在讲her work吗？所以我选了E。
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发表于 2009-11-15 23:36:44
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