Before the construction of the road, it was prohibitively expensive to transport any furs or fruits across the mountains.
【正确答案】
D
【答案解析】本句是说在公路建成之前，把毛皮和水果运送过山的花费非常昂贵。句中prohibitively的意思是“禁止地，抑制地”。与它相接近的词是forbiddingly“禁止地”。determinedly“断然地”，incredibly“不能相信地”，amazingly“令人惊讶地”都不符合句意。