问题补充:
The bookstore has sold children’s books as they did last year.
A. twice as much
B. twice as many
C. as twice many
D. as twice much
答案:
A. twice as much
(答案→)B. twice as many
C. as twice many
D. as twice much
解析:考查倍数问题。本题倍数结构为:倍数 + as + adj + as,book为可数名词,故用many修饰,根据句意选择B。