--What a dean and bright classroom， isn’t it？

--Yes，it’s always clean and bright because it 　　　 every day．

　 A． cleans　　　　 B． cleaned　 　　　C． is cleaned　　　 D． was cleaned

--What a dean and bright classroom，isn’t it？

--Yes，it’s always clean and bright because it        every day．

A．cleans         B．cleaned         C．is cleaned         D．was cleaned