—They are quiet, aren’t they? —Yes. They are accustomed ______ at meals.
In spite of the thunderstorm, the children slept _____ all night.
It was decided to _____ the search when there was no hope of finding the missing girl alive.
He put in a special _____ for an extra day's holiday so that he could attend his daughter's wedding.
Scientists have to work hard to keep _____ with modern discoveries and developments.
He didn't _____ what I read because his mind was on something else.