1)I will have arrived at the office by 8.
2)They will not have slept for a long time.
3)Where will she have gone?
4)He will not have finished his work by 5 o'clock
5)I shall have written the report by 7 o'clock.
6)Who will have cleaned the house by 8 p.m.?
7) Fred will have read the book by the time you come to take it from him next Friday.
8)Susan will have washed all the dishes by her mother's coming back.
9)They'll have returned to town from their hiking holiday by next Monday.
10)My friends will have got married by next autumn.