单选题 The houses are made of stone. Houses so ______ are much expensive.
【正确答案】 B
【答案解析】[精解] 非谓语动词题。动词construct与第二句的主语Houses只可能是动宾关系,所以[A]、[C]和[D]是错误的,为干扰项。因此[B]正确选项。