Where's the book I gave you? What ________ it?

A．did you do with

B．have you done with

C．had you done with

D．do you do with

下列各组溶液中，不用其它试剂就能鉴别的是  [ ]

A．Na₂SO₄、H₂SO₄、AlCl₃、BaCl₂

B．MgSO₄、NaOH、HCl、Ba（NO₃）₂

C．MgCl₂、NaOH、H₂SO₄、Ba（NO₃）₂

D．Na₂CO₃、HCl、K₂SO₄、KNO₃