大一男生肺活量标准:. The classroom is so dirty that it needs ______ badly.

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A. clean B. to clean C. being cleaned D. cleaning

再这4种答案中选其1

D. need doing =need to be done
这里是主动表被动。本句的主语(classroom)实际上是doing 的逻辑上的宾语。
例如:The flowers need watering.=The flowers need to be watered.

B 由题中的needs知道,need在这里作行为动词,而need作行为动词时,后面要求用动词不定式形式。所以选B

选 B呀呀呀呀

教室太脏了,需要好好打扫一下下哟~~~~~~~~`~

B
固定搭配 need to do sth

C
供参考

D