(单选题)

According to the passage, the production of ______ has been used as a substitute for fossil fuels.

A.vegetable seeds

B.peanuts

C.olives

D.corn

参考答案：D

参考解析：

细节理解题。根据第三段第一句“Production of corn and soya beans has increased dramatically in the last years as an eco-friendly alternative to fossil fuels”可知，玉米和大豆作为化石燃料的环保替代品，其产量急剧增加。因此，化石燃料的替代品主要为“corn and soya beans”；故选D。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-高中英语