根据句意, 用括号中所给词的正确形式填空, 每空不限一词. 1. The police believe these footprints are one of the _____________ (thief). 2. The man in his _____________ (forty) is the person who saved that boy. 3. The old man said that he __________ (lie) in bed from eight to ten last night． 4. No country _________ (make) such great progress as China in the past thirty years. 5. All the students _____________ (divide) into four groups and then they went on hiking with four teachers.