问题描述：
sam you always get up early every morning
not really but____
a.I used to it b.I'm used to it
c.I used to do it d.I'm used to do it
请帮忙说下选哪个 为什么选那个
not really but____
a.I used to it b.I'm used to it
c.I used to do it d.I'm used to do it
请帮忙说下选哪个 为什么选那个
问题解答：
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