5角硬币的外观呈金黄色，它是铜和锌的合金，市面上有人用它制成假金元宝行骗，小明同学用一种试剂揭穿了他。小明一定不会用的试剂是[ ]

A．硫酸铜溶液

B．硝酸银溶液

C．盐酸

D．硝酸钠溶液

______, he does get irritated with her sometimes.

A．As he likes her much

B．Much although he likes her

C．Though much he likes her

D．Much as he likes her