问题描述：
__or you’ll have a bad cold
a.if you put your sweater b put on your sweater
c.putting on your sweater d.To put on your sweater
请详解
并说明理由,
a.if you put your sweater b put on your sweater
c.putting on your sweater d.To put on your sweater
请详解
并说明理由,
问题解答：
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