______ 200BC, the Silk Road, which was the route for trade between the East and the West, was in use.A.As early asB.As far asC.As long asD.As well as
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A解析短语辨析。As early as 尽早； As far as至于，直到；As long as只要；As well as也，和……一样。句意：早在200年前，丝绸之路，在东西方之间的贸易之路就已经使用了。故选A。