Question

________ 200BC, the Silk Road, which was the route for trade

Answer 1

A

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。