what do people usually do at或on.什么时候用at,什么时候用on啊?new year's day halloween easter may day cgildren's day national day mid(一横）autumn festival dragon boat festival spring festival 都应该是at,还是on啊？

What do you_____(usual)eat for dinner what do you _____(usual)do with you friends? what wil the police be trying to do as usual? What do many people do? people,country,do,what,that What do most people use? What do English people use? what do people give?意思 what do we people from for what do people celebrate What do people do on this holiday? What do people usually do at Christmas? what do people usually do on Tancksgivingday? What do people usually do on vacation? What do people usuall do at Easter? what do all your people do What do people do on World Poetry What do people do in Independence Day?