by a greater demand of vegetables, farmers have built more green houses.
A. Driven
B. Being driven
C. To drive
D. Having driven
网友回答
(答案→)A. Driven
B. Being driven
C. To drive
D. Having driven
解析：考查过去分词做状语，drive后farmers是被动关系，用过去分词做状语，句意是：因为被蔬菜的巨大需求驱使，农民们盖了更多的绿色大棚。选A。