The roof of his house is made of ____(discard)tiles.此题答案为何为discarded?
问题描述：
The roof of his house is made of ____(discard)tiles.此题答案为何为discarded?
答
discard是动词,加ed做形容词用,意思是废弃的
全句就是 他的房子屋顶由被废弃的瓦片制成