--- What is your strongest memory of the bombing attack?

--- If I ______ rightly, we were about to approach the finish line when a big bang struck my ears.

A．will remember

B．had remembered

C．remember

D．remembered

取100mL0．3mol/L的H₂SO₄溶液和200mL 0．25mol/L的H₂SO₄溶液注入500mL容量瓶中，再加水至刻度线，所得溶液中H₂SO₄的物质的量浓度为 [ ]

A．0．265mol/L

B．0．525mol/L

C．0．16mol/L

D．0．42mol/L