【題目】China’s Silk Road Economic Belt, ____ accomplished, will quicken the economic growth of the countries along the route.

A. as B. once

C. though D. unless

【答案】B

【解析】

考查狀語從句。A. as由于； B. once 一旦； C. though盡管； D. unless除非。句意：中國的絲綢之路經(jīng)濟(jì)帶一旦建成，將加快沿線國家的經(jīng)濟(jì)增長。分析句子結(jié)構(gòu)可知，此處考查狀語從句的省略，表示“中國的絲綢之路經(jīng)濟(jì)帶一旦建成”，所以once符合語境。故選B。

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