A.computer
B.command
C.complicated
D.communication

A.robot
B.controller
C.operator
D.global

A.advances
B.diseases
C.escapes
D.watches

A.danger
B.risk
C.chance
D.threat

A.danger
B.risk
C.chance
D.threat

A.in
B.to
C.of
D.for

A.interacts
B.interactive
C.interactional
D.interactions

A.applicant
B.applicable
C.applications
D.apply

A.transacting
B.transferring
C.transmitting
D.translating

A.arrived
B.come
C.got
D.reached