是summer vacation还是summer holiday 前面介词用什么

请问是in summer vacation还是on summer vacation? 是summer vacation还是summer holiday 前面介词用什么 是in summer vacation还是in the summer vacation啊?我班同学因为这个吵了一节课. 在my summer vacation前面有on还是in. 这里的介词用in还是on?this summer vacation 前面的介词用in还是on?主要是限制summer还是vacation?还有像August of this year之类的, My sister loves travel in summer vacation.情分析in summer vacation 作什么成分?定语还是状语? My Summer Vacation summer vacation is coming! 是in vacation,还是on vacation,还是atvacation? 是in summer还是on summer 是in summer 还是in the summer 到底是结束(SHU)还是(SU) 住宿(正确读音是xu还是su) 住宿(正确读音是xu还是su) 是travel to vacation,还是travel on vacation 是go on vacation 还是go on a vacation?是go for vacation还是go for a vacation? -----,and students having returned,this college too will start out with-------effort in the work that lies before them.A.The summer vacation is over;greatB.The summer vacation being over;renewed.C.as the summer vacation over;refreshingingD.Had the su 英语作文my summer vacation