According to the passage salt flats were located in —

  what does the passage mainly discuss ?

  A seventeen year old is not — to vote in an election.

  Travellers — their reservations well in advance if they want to fly during the Eid holidays.

    All of the people at the AAME conference are—

  If a ruby is heated it — temporarily lose its color.

  A — statement is an — comparison; it does not compare. Things explicitly but suggest a likeness between them.