______ by a greater demand for vegetable...

______ by a greater demand for vegetables,farmers have built more green houses.

A．Driven	B．Being driven
C．To drive	D．Having driven

A 【解析】动词+ed形式作状语时，表示该动作与句子的主语是被动关系。动词+ed形式作状语可以表示时间、原因、方式或伴随情况等。根据farmers与drive的关系可确定用动词+ed形式作状语，表示被动。

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