Complete each sentence with one word.

1 We _______ better tidy up the sitting room before the guests arrive.
2 It _______ have been your mother who sent the flowers. She is always so thoughtful!
3 You _______ to get in touch with your Canadian cousins. I’m sure they’d be thrilled.
4 Marty and Laura _______ not have got back together. It’s simply impossible!
5 I’m not sure, but I _______ be late for the family dinner tomorrow, so feel free to start without me.