The floor is dirty and it requires .A. being cleanedB. cleanC. to cleanD. cleaning

问题补充：

The floor is dirty and it requires .

A. being cleaned

B. clean

C. to clean

D. cleaning

答案：

A. being cleaned

B. clean

C. to clean

(答案→)D. cleaning

解析： 句意：地板很脏，需要打扫。需要做某事，用require doing或require to be done,所以选D。