on/in summer vacation, on/in summer holidays 这两个在暑假 用in 和on都对吗?另外,表示寒暑假holiday 可以加s ,可否说 summer vacations呢？还有用in还是on 是不是和假日的单复数有关呢？

in summer holiday or on summer holiday 是in summer还是on summer 请问是in summer vacation还是on summer vacation? 在夏天是用in summer 还是on summer In a happy summer还是on a happy summer ( ) the summer holiday 填in还是on ______（in,on,at）summer holiday 关于in on summerin summer ,on a hot summer 里为什么用on 在暑假是on summer还是in summer还是at summer 是at the summer 还是 in the summer 还是on the summer 连词成句 please,your classmates,for a vacatio,discuss,with,about,the best pllace ( .)I have to get up ____ six ____ the morning.A at on B at in C on in D on at改错Must Tom go to the zoo?No,he mustn‘t.Must→A go→B No→C mustn’t→D带上 ()the summer holidays ,I offen work ()a farm A In in B On on C In on D On in 在my summer vacation前面有on还是in. the summer 前加on还是in还是at it is () to lie on the beach in summer There are many green l_____ on the tree in summer. IN SUMMER ,WE OFTEN FOBOATING ON THE L____WHY 英语翻译best wishes for you on the hot summer 还是in the hot summer?