After the new technique was introduced ,the factory produced ________ tractors in 1988 as the year before.
问题描述：
After the new technique was introduced ,the factory produced ________ tractors in 1988 as the year before.
A.as twice many.B.as many twice.
C.twice as many.D.twice many is.
答
选择C
the factory produced __twice as many______ tractors in 1988 as the year before.
翻译成 工厂在1998年生产的拖拉机是1997年的俩倍.
句中的twice是个副词,twice as many as .是个句型,应该这样用的