Free GMAT Practice Question

Question 1 of 1
ID: GMAT-LEG-VR-SC-012
Section: Verbal Reasoning - Sentence Correction
Topic: Subject Verb Agreement
Difficulty level: Easy

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The network of irrigation canals that carries meltwater to the terraced orchards were dug more than four centuries ago and have since been maintained entirely by hand, work that occupies several weeks each spring.

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