单选题   Furniture made of pure wood is certainly more expensive than ______ made of other materials.
 
【正确答案】 B
【答案解析】[考点] 代词用法题。 用实木制造的家具肯定比用其他材料制成的家具贵。 furniture“家具”是总称，为不可数名词，备选项中只有that能用来指代furniture，故B为答案。