They have produced_______ they d

They have produced_______ they did last year.
A、twice as much grain as
B、twice more grain as
C、twice as many grain as
D、as twice many grain as
【正确答案】：A
【题目解析】：句意是被动倍数；倍数的表示法有三种：倍数+as…as…；倍数+比较级+than；倍数+the size/length/weight/wideth/height of；句中grain是不可数名词，要用much来修饰．故选A