1,we do morning exercises at school every day （用tomorrow替换every day）
we（are ）（going）（to ）（do）morning exercises at school tomorrow
2,he is giong to（write a letter to his friend）tomorrow同上
（why）is he giong to（write a letter to his friend）tomorrow
3,my father wants to travel around the world after he retires（改成同义句）
my father wants to travel （all）（around）the world he retires