options: f : so it was unusual to see a plane in the early 1900s because there were few planes . f : so it was unusual to see a plane in the early 2000s because there were few planes . f : so it was unusual because because the government did n't want people to see planes . f : so it was unusual to see a plane in the early 1900s because planes were sent to fight .
article: f : how is travel in the 1960s different from that of the early 1900s dad ? m : well in the 1960s people rode in cars over wide roads . they flew in planes from europe to america in a few hours . f : what about the 1900s ? m : in the early 1900s planes were very new , to see one was so unusual that people of a town stopped what they were doing to watch it flying overhead .