题目内容：
The old man has two daughters, are doctors.A.both of them
B.both of whom
C.both who
D.they both
参考答案：
选择题：The old man has two daughters, are doctors.A.both
- 题目分类：广西培贤国际职业学院-大学英语2
- 题目类型：选择题
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A.both of them
B.both of whom
C.both who
D.they both