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题目内容
（商丘师范学院-英语语音与正音1）
(单选题) The emergency required that all the tasks ____________ at least two days ahead of time.(本题2.0分)
A、 to complete
B、 should complete
C、 be completed
D、 should have been completed
A、 to complete
B、 should complete
C、 be completed
D、 should have been completed
参考答案