06. Exhaust fumes / motor vehicles / pollute / air.
A. Exhaust fumes from motor vehicles pollute the air
B. Exhaust fumes from motor vehicles pollute air.
C. Exhaust fumes motor vehicles pollute air.
D. Exhaust fumes from motor vehicles pollutes air.
III. Choose the best answer ( A, B, C, or D ) to complete each sentence.
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