A.Out of job.
B.Out of hand.
C.Out of order.
D.Out of mind.

A.in hand
B.on hand
C.into hand
D.under hand

A.state
B.status
C.being
D.welfare

A.authority
B.right
C.way 
D.chance

A.protection
B.duty
C.responsibility
D.charge

A.reflect
B.bear
C.give
D.possess

A.reasons
B.excuses
C.grounds
D.foundation

A.come
B.reached
C.drawn
D.arrive

A.CaCO3 \(\xrightarrow{{{t^0}}}\) CaO + CO2.
B.CaSO3 + 2H+ ⟶ Ca2+ + SO2 ↑ + H2O.
C.CaCO3 + 2H+ ⟶ Ca2+ + CO2 ↑ + H2O.
D.CaCO3 + CO2 + H2O ⟶ Ca2+ + 2HCO3-

A.CaCO3 \(\xrightarrow{{{t^0}}}\) CaO + CO2.
B.CaSO3 + 2H+ ⟶ Ca2+ + SO2 ↑ + H2O.
C.CaCO3 + 2H+ ⟶ Ca2+ + CO2 ↑ + H2O.
D.CaCO3 + CO2 + H2O ⟶ Ca2+ + 2HCO3-