People eat        vegetables per person today as they did ten years ago.

A．as twice many                                     B．as twice as many

C．twice as many as                        D．twice as many

(2009陕西宝鸡质检)People eat        vegetables per person today as they did ten years ago.

       A．as twice many                                     B．as twice as many

       C．twice as many as                                  D．twice as many