单选题
The building______ by the end of next year will be used as our teaching block.
A、
to be completed
B、
completed
C、
being completed
D、
having been completed
【正确答案】
A
【答案解析】
当非谓语动词的被动式作定语时,表示动作尚未发生,用不定式;表示完成,用过去分词;表示进行,用现在分词。现在分词完成式的被动式通常不作定语。
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