A.To work
B.Working
C.Having worked
D.worked
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A.to discharge
B.to be discharged
C.discharging
D.being discharged
A.to send
B.to be sent
C.for being sent
D.being to send
A.sub-boards
B.main switchboards
C.emergency switchboards
D.distribution boards
A.check for respiration
B.check for pulse
C.treat for shock
D.All of the above
A.plastic
B.metal
C.stainless steel
D.copper
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