问题
选择题
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
答案
答案：C
题目分析：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。