People our support and help . We must do something at once.A. in needB. in need ofC. in n

问题补充：

People our support and help . We must do something at once.

A. in need

B. in need of

C. in need need

D. in need of need

答案：

A. in need

B. in need of

(答案→)C. in need need

D. in need of need

解析：此句的含义是那些需要帮助的人需要我们的帮助，我们必须立即做点事情。介词短语in need是定语用来修饰名词people。而动词need表示需要作谓语，故选C。