问题补充：
Nowadays workers are earningper month as they did in the 1990s.
A. twice as much as
B. as twice as much
C. as much twice as
D. twice as much
答案：
A. twice as much as
B. as twice as much
C. as much twice as
(答案→)D. twice as much
解析：考察倍数表达法。倍数表达法：倍数 as adj/adv原级 as；其中的倍数永远都放在最前面。故本题选择D。
