解决资本总公式形式上矛盾的根本条件是购买到劳动力这一特殊商品。对于资本主义生产方式来说，具有决定意义的是劳动力商品______。

A．使用价值的特殊性
B．价值构成的特殊性
C．形成条件的特殊性
D．物质内容的特殊性

They have produced　　　 they did last year.

A．twice more grain as

B．twice as much grain as

C．twice as many grain as

D．as twice many grain as