Chinese hydrologists, prevented from setting up modern rain-gauge infrastructure in the 20th century by invasion, civil war and the Cultural Revolution,have long relied on ancient roads, both geological and human, to inform the design of dams and canals.
A) have long relied on ancient roads, both geological and human, to inform the design of dams and canals.- CORRECT
B) have long relied on ancientroad , both geological and human, to inform the design of dams and canals. - Use of singular noun
...
A) have long relied on ancient roads, both geological and human, to inform the design of dams and canals.- CORRECT
B) have long relied on ancientroad , both geological and human, to inform the design of dams and canals. - Use of singular noun
...
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