Question

clark your room is really a

--Clark，your room is really in a mess．It needs ________．
--Sorry，mum．I'll do it at once．（　　）

A. clean

B. cleaned

C. to clean

D. to be cleaned

Answer 1

答案：D．
根据It needs 可知这里考查了need的用法：need在这里是一个实意动词，通常用于need to do sth需要做某事，后面跟to引导的不定式形式；it在这里指的是room，它和clean之间是被动关系，所以这里用含有to的被动形式：to+be+动词过去分词．故选D．