【单选题】
By 2050 the world will have about 2 billion people aged over 60, three times ______ today.
A.as much as
B.as that of
C.as many as
D.as those of
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根据网考网移动考试中心的统计,该试题:
1%的考友选择了A选项
13%的考友选择了B选项
82%的考友选择了C选项
4%的考友选择了D选项