29. If a person has not had enough sleep, his actions will give him ___ during the day. 　　　(A) away (B) up 　　　(C) in (D) back

31. It was announced that only when the fire was under control ___ to return to their homes. 　　　(A) the residents would be permitted 　　　(B) had the residents been permitted 　　　(C) would be residents be permitted 　　　(D) the residents had been permitted 　　　