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2.during one's stay;
3.during one's absence;
4.during the vacation;
5.wait on sb. hand and foot;
6.in [during] the course of the conference; during the conference;
7.scheduled period
8.between sessions; when the meeting stands adjourned;
9.open season; open time
10.during one's term of military service; during the period of enlistment;
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