According to the school rules, no child _______ be allowed out of the school during the day, unless accompanied by an adult.
______ difficult the problem was, he tried his best to solve it.
It is the teacher _____taught me when I was a child _____ I’m going to visit.
Nancy was very disappointed to hear the news. I wish I her about that.
, I got better and returned to work.
He was very busy yesterday;otherwise,he ______ to the meeting.