下列物质在水溶液中的电离方程式书写正确的是

A．KClO₃＝K⁺+3O^2—+Cl⁵⁺

B．NaHSO₄＝ Na⁺+HSO₄^—

C．H₂SO₄＝H⁺+ SO₄^2—

D．Al₂(SO₄)₃＝ 2Al³⁺+3SO₄^2—

As he was too fat, he tried several shirts _______ but ____ fitted him.

A．on; none

B．in; some

C．on; some

D．in; none