By the end of last month we had sold as we did last year.A. as twice many cupsB. twice

问题补充：

By the end of last month, we had sold as we did last year.

A. as twice many cups

B. twice cups as many

C. twice as many cups

D. as many cups twice

答案：

A. as twice many cups

B. twice cups as many

(答案→)C. twice as many cups

D. as many cups twice

解析：

这题考查倍数：结构是：倍数+as+adj+as的用法，句意是：到上个月底为止，我们卖了去年两倍的杯子，选C。