Use Future Perfect:
1) You .......(read)the book before the next class.
2) She ....(not/finish)work by seven.
3) They .....(arrive )by dinner time.
4).......(you/do)everything by seven?
5) We......(not/eat)before we come,so we'll be hungry.
6) We.....(be)in London for teren years next week.
7).......(she/get)home by lunch time?​