Serveral pairs of old shoes need .A. washedB. to washC. washingD. to being washed

问题补充：

Serveral pairs of old shoes need .

A. washed

B. to wash

C. washing

D. to being washed

答案：

A. washed

B. to wash

(答案→)C. washing

D. to being washed

解析：need作需要解时，后面的宾语要跟动名词的主动形式表示被动意思。