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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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1.首先判断so和and，根据句意前后关系应该是因果而非并列，所以排除and选项D,E
2. so as to主语和主句主语一致所以排除A
3. wasted water和water wasted明显应该是water wasted in there因为wasted water不知道是谁把水waste了
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