已知某溶液中存在较多的，该溶液中还可能大量存在的离子组是

A．

B．

C．Mg²⁺、Cl^－、Fe²⁺

D．K⁺、SiO、Cl^－

Because our work is very busy, so we need to relax at midday.

A．We are very busy,

B．Our work being busy,

C．Our work so very busy,

D．Because our work so very busy,