Used towels must be placed in bins provided的翻译

Used towels must be placed in bins provided的翻译 be used be used be used be used 有must be used说法吗?如果有,请问题怎么用,used 后面跟for 还是on呢. 外贸英语翻译 stretch wrap must not be used on individual cartons 查询国外的酒店预订,写着 Voucher must be used in 1 visit. THIS DRAWING IS USED AS A TEMPLATE.ALL CHANGES MUST BE 1/1 SCALE. Articles used by patients must be disinfected before _____ others.A.using B.being used by C.used by D.being using 请问为什么不选C,.. 英语句子翻译：These plans must be modified, if they are to be used successfully. 尤其是if后面的. must be what must be must be! be used for be used to be used from区别 can be used ,will be used 区别 The ___tissues must be put into a covered trash container immediately after _____.A.used ,using B.used ,use答案是B但我觉得两个都不对应该是used,being used啊 英语翻译Metal Detection equipment used must be ‘Ferrous Only Metal Detectors’ (Used toinspect products that contain approved non-ferrous,non-magnetic components). be used for doing,be used to do,be used as,be used in,be used to doing,used to