问题描述：
by the end of last year,another new gymnasium ___ in beijing
By the end of last year,another new gymnasium ___ in beijinga.would be completed b.has been completed c.had been completed
选C 为何选过完?
By the end of last year,another new gymnasium ___ in beijinga.would be completed b.has been completed c.had been completed
选C 为何选过完?
问题解答：
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