Question

【题目】After 40 years of reform and opening-up, China still has a long way to go it becomes a “developed economy”.

A. until B. before

C. after D. unless

Answer 1

【答案】B

【解析】

考查连词。句意：经过40年的改革开放，中国在成为“发达经济体”之前还有很长的路要走。A. until直到---为止；B. before在---之前；C. after在---之后；D. unless除非。故选B。