—Hey! What's the rush?—The plane ________ at 4∶00 and I need to see my uncle off.
Keep _______ when I take your photograph.
—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.