Paper produced every year is the world’s production of vehicles.
A. the three times weight of
B. heavier three times than
C. as three times heavy as
D. three times the weight of
网友回答
A. the three times weight of
B. heavier three times than
C. as three times heavy as
(答案→)D. three times the weight of
解析：句意，每年生产的纸张数量是世界车辆生产重量的3倍。这里使用的是倍数的表达：“A is倍数+the weight of B”(A是B的几倍重)，这是固定用法，故选D。