1.Many
scientists believe it's impossible that one day we will live on other planets.
2.This time
tomorrow i'll be writing an email.
3.I don't
believe that computers will ever be developed to be more intelligent than
humans.
4.I'll have
finished fixing this computer by the time my boss comes back.
5.In thirty
years' time , most people will be using their TV as the screen for their
computers.
6.By the
time he finishes his computer course , he'll have spent over 500 dollars.