______ Mary found her lost pen the day before yesterday?

A．Where do you think it was that

B．Do you think where it was that

C．Do you think it was where that

D．Where you think it was that

能用来鉴别稀盐酸、纯水、澄清的石灰水三瓶无色液体的试剂是（　　）

A．酚酞试液

B．稀硝酸

C．碳酸钠溶液

D．硫酸钠溶液