Chia động từ sau cho phù hợp

1) It __________ (be) a day in December. Snow _________ (fall), children ___________ (sing) carols and people ______ (do) their Christmas shopping.
2) My ex-boyfriend __________ (be) so annoying! He _________ (always / miss) the bus and _______ (arrive) late.
3) I (enjoy) my book so much that I ___________ (not / notice) the train had stopped.