on the school还是at the school

on the school还是at the school in the school trip还是at the school trip还是on, 是AT SCHOOL 还是 ON SCHOOL “()of June 15th.是at night还是on the night? 对括号提问 1 we （ play soccer） at school after class 2 the party is (on july 7th) When is the school trip?October 26th Have a school day at your school?Yes.When?April 20th the 100th day of school begins on the 100th day of Thursday 30th of Nov 用on 还是at? 初中英语介词（ ）weekends 是in还是at（ ）the evening of August 8th 2008,是in 还是on还是at It is at the morning on jan.10th at were on we the August Stationer's 15th at after school正确还是on after school正确 on school team还是 on the school teamwhy? At the 27th 提问句we have an English speech at our school on November 16th 方为介词in at on的用法!咧：in school 还是at school 还是on school?为什么? 是at school days 还是 on school days 还是 in school days 是in the afternoon of April 30th 还是 on the afternoon of April 30th