问题
选择题
This year they have produced_________ they produced the year before last.
A．twice many cars as
B．twice as many cars as
C．twice more than cars
D．twice the cars of
答案
答案：B
考查倍数。倍数的表达有：倍数 + as + 形容词或副词的原级 + as + 其他；倍数 + 形容词（或副词）的比较级 + than + 其他；倍数 + the size / height / length / width. etc. + of + 其他。故选B。