Unfortunately, when I dropped in, Doctor Li _____ for Beijing to join in the fight again SARS, so we only had time for a few words.
_____, I couldn’t find a solution to the problem.
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.