The people had been damaged by the flood were given help by the Red Cross.A. all whose

问题补充：

The people, had been damaged by the flood, were given help by the Red Cross.

A. all whose homes

B. all of whose homes

C. all their homes

D. all of their homes

答案：

A. all whose homes

(答案→)B. all of whose homes

C. all their homes

D. all of their homes

解析：考定语从句。把从句部分还原一下是：all of the people’s homes had been damaged by the flood。C、D选项没有用关系词，故不对。