The government __________ air quality in urban areas from level one to five : excellent,fairly good, slightly polluted, poor and dangerous.
A.arranges |
B.classifies |
C.distributes |
D.divides |
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The government __________ air quality in urban areas from level one to five : excellent,fairly good, slightly polluted, poor and dangerous.
A.arranges |
B.classifies |
C.distributes |
D.divides |