__of the population here are peasants.
A. 20 percents
B. 20 percent
C. the 20 percent
D. the 20 percents
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It's about__ , the thickness of a human hair.
A. two-fifteenth
B. two-fifteenths
C. two fifteen
D. two fifteens
The price of such material was reduced__ .
A. by 18 percent
B. to 18 percent
C. at 18 percent
D. for 18 percent
They sold __boxes of such sweets last week.
A. four dozen
B. four dozens
C. four dozens of
D. four dozen of
It took me __ days to finish drawing a beautiful horse.
A. a half dozen
B. half a dozen
C. haft dozens
D. half dozen
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