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Answers
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A. as using a machine although machines use electricity, require maintenance, and take up space
B. than using a machine does although machines use electricity, require maintenance, and take up space
C. than using a machine although machines use electricity, require maintenance, and take up space
D. than using a machine does although machines use electricity, require maintenance, and large spaces
E. than using a machine does although machines require maintenance, electrical, and take up space
OA B
Source: Economist GMAT













