摘要: By the end of last year,another new gymnasium in Beijing. A. would be completed B. was being completed C. has been completed D. had been completed [解析] 如:by意为“到--为止 .by后加过去时间.主句用过去完成时.如by后加现在时间.用现在完成时.如by后加将来时.主句要用将来完成时.by the end of last year常与过去完成时连用.表示到过去某个时候前已完成的动作.答案为D.

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