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Question 19: A. usually have fewer trees and green areas than rich districts do B. which, unlike rich districts, have invested heavily in tr...
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Question 19:
A. usually have fewer trees and green areas than rich districts do
B. which, unlike rich districts, have invested heavily in tree planting in recent years
C. which usually have fewer trees and green areas than rich districts
D. are usually located near large parks and green belts in the city
