correct these sentences with at/on/in if necessary:
1,she is going home to australia on christmas
2,the exhibition opens in berlin at the end of may
3,northern sweden is beautiful,but i wouldn't go at the middle of january
4,if she gets feverish at the night,give her two tablets
5,the baby is due to be born on chrismas eve
6,by then,it was about 3:00 in the morning and i felt tired
7,he would arrive around ten in night carrying his suitcase
8,the survivors were found in the morning of friday
9,it is a holiday in the usa at the 4th july
10,she closed her eyes and at a moment was fast asleep