题目

The building ____ by the end of next month will contain the lab. A. being completed            B. has been completed C. to be completed             D. to have completed 答案： C 解析: 考查done, being done, to be done之区别done（过去分词）表示已完成的动作; being done（现在分词的被动式）表示正在进行的动作; to be done（不定式的被动式）表示将要发生的动作。

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