能正确表示下列反应的离子方程式为[ ]

A．少量SO₂通入苯酚钠溶液中（酸性：H₂SO₃>HSO₃^->苯酚）：SO₂＋H₂O＋C₆H₅O^-＝C₆H₅OH+HSO₃^-

B．将Na₂O₂固体投入H₂¹⁸O中：2Na₂O₂＋2H₂¹⁸O＝4Na⁺＋4OH^-＋¹⁸O₂↑

C．向溴化亚铁溶液中通入过量氯气：Fe²⁺ + 2Br^- + 2Cl₂ == Fe³⁺ + Br₂ + 4Cl^-

D．向NH₄Al(SO₄)₂溶液中滴入Ba(OH)₂溶液，恰好使SO₄^2-完全沉淀：NH₄⁺＋Al³⁺＋2SO₄^2-＋2Ba²⁺＋

4OH^-＝Al(OH)₃↓＋NH₃·H₂O＋2BaSO₄↓

句型转换。

1. Don't bring friends from other schools, or  the teachers will ask them to leave. (改为同义句)

    _____ _____ bring friends from other  schools, the teachers will ask them to leave.

2. I will play volleyball if it is fine tomorrow. (对划线部分提问)

    _____ _____ you _____ if it is fine  tomorrow?

3. The students stood there and didn't know  what they should do next. (改为同义句)

    The students stood there and didn't know_____ _____ _____ next.

4. They are going to do more practice. They will  win the match. (改为含有if条件句的复合句) 

    They_____more practice, they _____ _____ the match.

5. If you study hard,  you'll catch up with  others. (改为并列句)

    _____ _____, or you'll fall behind others.