在复盐NH₄Fe(SO₄)₂溶液中逐滴加入Ba(OH)₂溶液，可能发生的反应的离子方程式是

A．Fe²⁺+SO₄^2－+Ba²⁺+2OH^－=BaSO₄↓+Fe(OH)₂↓

B．NH₄⁺+Fe³⁺+ 2SO₄^2－+ 2Ba²⁺+ 4OH^－=2BaSO₄↓+ Fe(OH)₃↓+ NH₃·H₂O

C．2Fe³⁺+ 3SO₄^2－+ 3Ba²⁺+6OH^－=3BaSO₄↓+ 2Fe(OH)₃↓

D．3NH₄⁺+ Fe³⁺+3SO₄^2－+ 3Ba²⁺+ 6OH^－=3BaSO₄↓+Fe(OH)₃↓+3NH₃·H₂O

The death of her dog made her sad, and it took a long time to    it.

A．put off

B．get down

C．get over

D．come across