1. People paint many eggs ______ Easter(at/on/in).2.When I was a little

1. People paint many eggs ______ Easter(at/on/in).
2.When I was a little child I_______ much time on the bank of the river(used to spend/spend/was spending/has spent).
3.They had to go early though it was a _______ evening(coldly/cold/coldest/more coldly).
4.Now I am very busy. Then I'll see you _______ next Monday(at/on/in).
5.When mother entered the baby _______ bitterly(is crying/were crying/has cried/was crying).