根据句意，用括号中所给词的正确形式填空，每空不限一词。The police believe these footprints are one of the _____________ (thief).
The man in his _____________ (forty) is the person who saved that boy.
The old man said that he __________ (lie) in bed from eight to ten last night．
No country _________ (make) such great progress as China in the past thirty years.
All the students _____________ (divide) into four groups and then they went on hiking with four teachers.