1-i thought by our arrival,but . варианты: will have done,had been; would have been doing,have been; will do,am; would have done,was. 2- he has said that 7 o'clock. варианты: will have come; would have come; will come; would come. 3-we said that by the time up two hours. варианты-picks,will have been driving; would pick,would have driven; picked,would have been driving; would have picked,would be driving. 4- he has said book by the time to give it back.варианты- will have read,ask; would have been reading,had asked; would have read,asked; will have read,have asked.
2) will come
3) would have picked, would be driving.
4) will have read, ask