在下列物理化学除氟方法中，目前最常用的一种方法是

A．混凝沉淀法

B．骨碳吸附法

C．电凝聚法

D．活性氧化铝法

E．电渗析法

We _____ know things about each other that we should not know, have no right _____, and have a right, actually, not to know.

A．increasingly; to know

B．decreasedly; knowing

C．increasingly; know

D．decreasingly; knew