Economy is booming, so it is hard for some of the firms to _____ enough labor , though their working conditions are rather good.
Whoever leaves the room last must __________ that all the lights are turned off.
Our English teacher is very strict __________ us and __________ his teaching.
Mr Smith is strict __________ us __________ our studies.
She took drugs all day and showed no __________ for her children, who died of hunger at last.
—You know, Bob is a little slow __________ understanding. —So I have to be patient __________ him.