My room is a mess. It needs ______.

My room is a mess. It needs ______.
A、to be tidying up
B、tidying up
C、to tidy up
D、tidied up
【正确答案】：B
【题目解析】：句型“主语(物)+need (want，request)+ doing (to be done)”中，动词后面用动名词的主动形式来表示被动含义或不定式的被动形式来表示。