He can't go traveling very often as his work __________ almost all his time.
You should make it a rule to leave things ________you can find them again.
This is the best book _____ I have been looking for all this year.
Lucy has a great sense of humour and always keeps her colleagues _____ with her stories.
_____ do you think will teach us maths next term?
_____ that there is another good harvest this year.