They said good-bye, little knowing that they _______ again.
I’m sorry to say that I can’t imagine such a gentleman _____ be so rude to a lady.
--- Did you go to London for vacation? --- I _____ to go, but I got sick at the last minutes.
Higher temperature turning large ice sheet to water would cause _____ rise in sea levels worldwide and change _____ weather on earth.
It was raining heavily. Little Mary felt cold, so she stood _______ to her mother.
I will never understand how it __________ that you were an hour late on such a short journey.