harry is leaving .he has been here since a month ()A.before B,later C.ago D.ahead 求理由

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harry is leaving .he has been here since a month ()A.before B,later C.ago D.ahead 求理由

harry is leaving .he has been here since a month ()A.before B,later C.ago D.ahead 求理由
harry is leaving .he has been here since a month ()A.before B,later C.ago D.ahead 求理由

harry is leaving .he has been here since a month ()A.before B,later C.ago D.ahead 求理由
正确:C (since后面常接表示过去的时间段的短语).

C

从一个月以前算起至现在, since 和现在完成时连用(has been here )


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