单选题
The fire started on the first floor of the hospital ______ were elderly and weak.
A、
many of its patients
B、
many of whose patients
C、
many patients of whom
D、
many of which patients
【正确答案】
B
【答案解析】
[解析] whose为关系代词，many of whose patients也可以改写为of whose patients many were...
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