—How much did they ________ for it?—I’m sorry I can’t remember ________, but I bought it at sale.
—May I put my luggage on the seat beside you, sir? —_________________.
—HowmuchdoIoweyouforlunch? —________________.It’snothing.
It ________ that their plan was practical and successful.
It is considered a good way for students to ________study with pleasure.
It is known to all that a proper amount of exercise ________ to good health.