I can’t help_________if my students are always making any noise in class.
—Hi, Mary! Do you know where Jim is? — I think he ________ a lecture in the library.
— Are you sure you won’t come for a drink with us? —_____, if you insist.
They must have been enjoying themselves there, or they _____ so long.
_____ and you will break the world record.
— Where did you live as a child? —— A village _____ by hills on three sides.