【单选题】

What worried the child most was ______ to visit his mother in the hospital.

A、his not allowing
B、his not being allowed
C、his being not allowed
D、having not been allowed

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根据网考网移动考试中心的统计，该试题：

11%的考友选择了A选项

79%的考友选择了B选项

5%的考友选择了C选项

5%的考友选择了D选项