Paper bags produced every year are the world’s production of vehicles.
A. as three times heavy as
B. three times weight of
C. three times the weight of
D. three times as heavier as
网友回答
A. as three times heavy as
B. three times weight of
(答案→)C. three times the weight of
D. three times as heavier as
解析：考查倍数的表示方法。倍数放在as...as, the +名词+of, 比较级的后面，排除A、D；the weight of...“......的重量”，故选C。