(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

(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

出自：商丘师范学院-英语语音与正音1

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