Paper bags produced every year are _____
题型：选择题
问题：
Paper bags produced every year are ______ the world’s production of vehicles.
A．three times the weight of
B．three times weight of
C．as three times heavy as
D．three times as heavier as
题型：选择题
Paper bags produced every year are ______ the world’s production of vehicles.
A．three times the weight of
B．three times weight of
C．as three times heavy as
D．three times as heavier as
