The refugee crisis(难民危机) in Europe, if ________ properly, can lead to serious social problems.
The meeting was _____ when the chairman fell ill.
The members of the club wouldn't run a _____ in entrusting(委托) the organization to an unreliable person.
Many new _____ will be opened up in the future for those with a university education.
It isn't quite _____ that he will be present at the meeting.
The child enjoyed _____ up the wooden bricks then knocking them down.