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题库 / GMATAdvanced-SC-33
Sophisticated laser-guided land graders can now flatten uneven farmland almost perfectly so as not to waste rainwater in runoff down sloping fields.
so as not to waste rainwater
so that rainwater is not wasted
so that there is no wasted rainwater
and thereby not waste rainwater
and there is no rainwater wasted
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sc
A. so as to 的主语是句子的主语，压土机本身不会浪费水
C. 不是there is no wasted rainwater 而是 there is no rainwater wasted
D. and应连接两个句子
E. 根据句子逻辑应该是前面导致后面的发生，故应用so that 连接较好
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