单选题 It would be wildly optimistic to believe that these advances offset such a large reduction in farmland.
【正确答案】 B
【答案解析】[解析] 题干：要是认为这些进步能抵消这样大的农田缩减所带来的负面影响就过于乐观了。make up弥补，take in吸收，理解；cut down砍倒，削减；bring about使发生，致使。根据题意，B为正确选项。