题目

.The classroom is so dirty that it needs ______ badly.
A.clean B.to clean C.being cleaned D.cleaning
再这4种答案中选其1

提问时间：2020-06-25

答案

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.