问题补充：
It is reported that the United States uses energy as the whole of Europe.
A. as twice
B. twice much
C. twice much as
D. twice as much
答案：
A. as twice
B. twice much
C. twice much as
(答案→)D. twice as much
解析：考查倍数的表达：句意：据报道美国人使用的能源是整个欧洲的两倍。倍数的一种表达是：倍数+as+adj+as，倍数在前，排除A，后面有as了，所以选B。
