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：考查倍数表达法：这题使用的是：“A+倍数+as+形容词+名词+as+B”，表示“A的…正好是B的多少倍”。句意：据报道美国使用的能源是整个欧洲的两倍。选B。
