百度知道上有这么一个：1993年6月四级第68题 The residents, _________ had been damaged by the flood, were given help by the Red Cross. A) all their homes B) all whose homes C) all of whose homes D) all of their homes 全句意思是：“那些房屋全部被洪水毁坏的居民得到了红十字会的救济”。两格逗号之间显然是一个定语从句，修饰the residents。选项B和C中都有关系代词whose，可以起连接作用。但是，我们可以说all of whose homes，而不能说all whose homes。所以本题的答案是C) all。选项A和D中都没有连接定语从句的关系代词，因此不对。我的问题是：The people, -------had been damaged by the flood, were given help by the Red Cross.A. all whose homes B.all their homes C. all of their homes D. all of whose homes 答案是d。可是A可以看作all是the people的同位语，而whose homes had been damaged by the flood是all的定语从句。而且有all of whose 的形式吗？至诚感谢

whose后面必须有名词，否则必错

再请问，a错在哪？ 谢啦