【单选题】
He found it necessary for us ______ from each other.
[A] to help and learn [B] helping and learning
[C] to learn and to help[D] learning and helping
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根据网考网移动考试中心的统计,该试题:
50%的考友选择了A选项
2%的考友选择了B选项
39%的考友选择了C选项
9%的考友选择了D选项