When I returned to my study, I found the floor thoroughly______and all my books______according to the types of books
A.changing; ranging
B.changed; ranging
C.have changed; ranged
D.has changed; ranged
网友回答
B解析本题考查find +宾语+宾补的用法。The floor与clean之间为被动关系，要用过去分词cleaned做宾语补足语；all my books与range为主动关系，要用现在分词ranging做宾语补足语。