问题
选择题
The house was reduced to _____by the fire _____by a cigarette butt.
A． ash, cause
B．ashes, being caused
C． ash, being caused
D．ashes, caused
答案
答案：D
考查非谓语动词。句意：这所房子被一场有烟头引起的大火化为灰烬。Ash是可数名词，结合语境可知应用复数形式。过去分词作补足语表示被动的发生过的动作，和被修饰词是动宾关系。故选D。