Up to now large quantities of food to Africa to save the starving people.A. has been sent

问题补充：

Up to now, large quantities of food to Africa to save the starving people.

A. has been sent

B. have been sent

C. are sent

D. is sent

答案：

A. has been sent

(答案→)B. have been sent

C. are sent

D. is sent

解析：考查固定结构。large quantities of +n做主语时，谓语动词一直用复数。根据up to now,与完成时连用。