[ Grammar ]
Air pollution, together with littering, has _____ many problems in our large cities today.
A. caused
B. made
C. affected
D. brought
Select your answer:
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Other quiz:
Grammar › ViewI am sure you………. me, did you?
A. understood
B. understand
C. didn’t understand
D. weren’t understand
Vocabulary & Grammar › View
We believe that the _______ and preservation of natural resources and habitats should be part of technological and economic development.
A. conservation
B. conservationist
C. conserve
D. conservative
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