A.understand how to do something
B.sail along the area of water
C.find which way to go
D.surfing the internet for something

A.
B.
C.
D.

A.to repair
B.repair
C.repaired
D.repairing

A.have
B.make
C.take
D.get

A.carried
B.carry
C.to carry
D.been carried

A.existence
B.problem
C.awareness  
D.idea

A.application
B.request
C.programme
D.relation

A.persons
B.controls
C.fingers
D.hands

A.equipment
B.devices
C.aids  
D.contribution

A.Although
B.As
C.Therefore
D.When