It is hot and dry; the flowers need ______.

It is hot and dry; the flowers need ______.
A、being watered
B、be watered
C、to water
D、to be watered
【正确答案】：D
【题目解析】：固定用法，need to be done前面的被修饰词与be done的动词是被动关系。need to be done=need doing。