【单选题】

The medicine has many functions, ______ are unknown to us.
A．some of which

B．that some of them
C．of which some of them
D．which of them

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根据网考网移动考试中心的统计，该试题：

53%的考友选择了A选项

9%的考友选择了B选项

5%的考友选择了C选项

33%的考友选择了D选项

The medicine has many functions, ______ are unknown to us.A．some of which