By the time she ___ in the gymnastics tournament, she had been a junior gymnast for 11 years.

By the time she ___ in the gymnastics tournament, she had been a junior gymnast for 11 years.
A. competed B. competing C. to compete D. compete
【答案】A
【解析】
【详解】考查时态。句意：到她参加体操锦标赛时，她已经成为一名初级体操运动员有11年了。分析句子成分，所填词是句中的谓语动词；根据主句的过去完成时时态had been…可知，句子叙述的是过去的事情，从句应该用一般过去时。故选A项。