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

【解析】D

試題分析：倍數(shù)表達法主要有以下幾種方式：（1）……倍數(shù)+形容詞（或副詞）的比較級+than；（2）……倍數(shù)+as+形容詞或副詞+as；（3）……倍數(shù)+the size（length，height…）of。故選D。

考點：考查倍數(shù)表達法

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