下列变化必需加入氧化剂才能实现的是（　　）

A．NH₄⁺→NH₃

B．SO₃^2-→SO₄^2-

C．HNO₃→NO

D．CO₃^2-→CO₂

_______ I want very much is a new car.

A．All which

B．All that

C．All what

D．What that