а) to be excited, to work in the garden, to decorate the streets, to celebrate the New Year Day, to exchange presents/gifts, to watch fireworks/salute, to have a good time.
b) to go shopping/to do the shopping, to make tea, to prepare decorations, to make/cook/prepare food, to dust, to call/to phone/to ring up, to wash up/to wash the dishes, to deliver a speech, to make a report, to do homework.
c) We always celebrate Mum's birthday. It's always in September, in autumn.
I decorate the flat. Granny bakes/makes a cake and cooks a special dish. My twin
brothers are prepare bright holiday decorations. We get nicely dressed , buy roses for Mum and sing her favourite song.