I don’t know whether you happen ____ that he has been away for two months.
In Britain today, women ______ 44% of the workforce, and nearly half the mothers with children are in paid work.
_____ to train his daughter in computer, he put an ad like this in the paper, “_____ , a computer teacher for a ten-year-old girl.”
Mother thought it no use _____ me to marry John.
I like _____ in the autumn when the weather is clear and bright.
Generally it is ____ bad manners to blow your nose at ____ table or spit (吐痰) in ____ public places.