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Future perfect and future perfect continuous

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  • We (not wear) glasses for a long time.
    won't have been wearing
  • Flying cars (become) popular by 2100.
    will have become
  • People only (eat) processed food for a long time.
    will have been eating
  • We (not buy) batteries in a long time.
    won't have bought
  • We (use) cleaner fuels for some time.
    will have been using
  • The cure for some serious medical conditions (find) by 2100.
    will have been found
  • People (travel) to the moon for some time.
    will have been traveling
  • Some planets (discover) in 30 years from now.
    will have been discovered
  • USB drives (dissapeared) by 2050.
    will have dissapeared
  • My friends and I (reach) the age of 80 by 2050.
    will have reached