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Staff remaining in the lounge should notify their immediate supervisors before__
Staff remaining in the lounge should notify their immediate supervisors before__
游客
2025-06-18
23
管理
问题
Staff remaining in the lounge should notify their immediate supervisors before_______to their work.
选项
A、returning
B、returns
C、returned
D、to return
答案
A
解析
空格内应填入非谓语动词。由于before是连词,后面填入分词形式的A选项或C选项都有可能。这个分词用来修饰主句中的主语staff,而staff是return to their work的行为主体。因此主动语态的A选项是正确答案。
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