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_____thishashappenedonoccasion,thisistheexceptionanddefinitelynottherule.
InourletterofMay5,wemade__________clearthatshipmentistobeeffectedinJune.
Youdonotwanttosquandertimeandeffortonaposition______isnotagoodfit.
Therearemany___todosofortheparticipants.
Whatisthemainadvantageofradioads:（）