Before Ray Tomlinson’s invention it was impossible ______.
1
Locate the part of the text discussing communication methods before Ray Tomlinson's invention.
2
The text states: 'Yet these previous forms of electronic communication only allowed people to send messages to other users of the same computer or to numbered mailboxes where the messages had to be printed out.'
Why does the author mention the story with the dog?
1
The sentence immediately preceding the dog story states: "But cell phones seem to encourage us to do too many things at the same time."
2
The author then describes a person riding a bike, holding a dog's leash, and talking on a phone simultaneously, highlighting potential dangers such as the dog chasing a squirrel or an accident.