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问题: 单选题

_____I have read this magazine ,you can have it.
A Though
B Since
C Until

请着重解释原因,since / until 用法区别

解答:

这里取的是Since有“既然”之意,“既然我已经读过这本杂志了,你拿去看吧。”
Since 计算的时间一般是从过去算起
Until 是从现在往将来的时间延伸