单选题 A green building is often built on an area of land ______. [A] which has thick forests around [B] which has already been for buildings [C] where people of high income live

【正确答案】 B

【答案解析】细节题。根据第四段最后一句话“Green building are often built on developed land，so that the buildings do not destroy forests”，可知绿色建筑是建在已开发地区的。所以[B]正确。