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The city has improved a lot I came here a few years ago.

A.for B.but C.because D.since

D

【解析】

试题分析:句意:自从我几年前来到这儿,这座城市已经改善了很多。A.for为了;B.but但是;C.because因为;D.since 自从。for和since都可与现在完成时连用,for后接一段时间,since后接某一时间点。故选D。

考点: 考查连词的辨析。

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