Complete each sentence with one word.

1 It …… not have been Josh who left the message - it doesn't sound like him at all.
2 It …… have been Scott who sent the gift - he remembers everyone's birthdays.
3 We …… have to cancel the party next week because several family members are ill.
4 It ….. have been your mother who sent the flowers. She is always so thoughtful.
5 You ……. to get in touch with your Canadian cousins. I'm sure they'd be thrilled.