I didn't buy the coat you suggested to me in the department store as it's _____ expensive.[ ]

A. far too much

B. far too

C. too much

D. very much

如图所示装置，向试管里的水中加入某种物质后， U形管右边支管的红墨水液面降低，左边支管的红墨水液面上升，则加入的物质可能是                  。

A．氢氧化钠

B．生石灰

C．冰块

D．硝酸铵