(1) The dream of being instantly transported from one point on the globe to another has thus far been
confined to the realm of science fiction. (2) However, thanks to technological advances, researchers are
now closer than ever to making that dream-or at least a version of it-a reality.
(3) High-tech teams around the world are working on projects designed to enhance people's
"telepresence"-their sense of physically being in a location even when they are actually thousands of
miles away. (4) Users of this developing technology can "visit" faraway destinations embodied in
sophisticated robots. (5) The visitors wear goggles and suits with sensors that allow them to see and feel in
real time what their robot avatars are experiencing. (6) Microphones, speakers, and headphones allow two-
way communication with the people at the other end, providing the visitors with a true sense of physically
being there.
(7) Cruder forms of telepresence robots are already being used in some American offices. (8) Rather
than commuting long distances, they can use their home computers to maneuver simple wheeled robots
around the head office. (9) These robots are equipped with cameras and video screens. (10) The robots
allow the home-bound workers to attend meetings and interact more personally with their coworkers.
(11) A host of ethical issues must still be overcome before these technologies become widespread,
including concerns over whether telepresence robots might infringe on the privacy of users. (12) But the
day when we can physically experience a place on the other side of the world without actually leaving home
may not be that far off.
Question
The following sentence would best fit immediately after which sentence in the second paragraph
(sentences 3-6)?
Meanwhile, the robots' eye and body movements mimic those of the human visitors they represent.
O Sentence 3
O Sentence 4
O Sentence 5
Sentence 6
