Your floor is dirty. It needs . A. cleanB. to cleanC. cleaningD. cleaned

问题补充：

Your floor is dirty. It needs .

A. clean

B. to clean

C. cleaning

D. cleaned

答案：

A. clean

B. to clean

(答案→)C. cleaning

D. cleaned

解析：考查非谓语动词。句意：你的地面脏了。需要打扫。动名词表示抽象动作。故选C。