问题描述：
sing | sang | singing | to sing的区别是什么?
Most of the yung pepole enjoy ___ pop songs.
A:sing B:sang C:singing D:to sing
打错了，是 young
Most of the yung pepole enjoy ___ pop songs.
A:sing B:sang C:singing D:to sing
打错了，是 young
问题解答：
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