— It seems that Peter has nothing to do at the moment.

— Let me give him             to read. [ ]

A．anything

B．something

C．everything

D．nothing

NaCl溶液中含有Ca(HCO₃)₂、MgSO₄、CaSO₄等杂质，其除去方法正确的是 [ ]

A．Ba(OH)₂溶液→Na₂CO₃溶液→盐酸

B．Ba(OH)₂溶液→盐酸→Na₂CO₃溶液

C．Na₂CO₃溶液→Ba(OH)₂溶液→盐酸

D．盐酸→Na₂CO₃溶液→Ba(OH)₂溶液