I don't know______ he lost his gold watch yesterday.

A．where is it that

B．where was it that

C．where it was that

D．where is that

如图所示的物态变化图中，①②③所表示的物质状态依次是

A.固态、液态、气态

B.固态、气态、液态

C.液态、气态、固态

D.气态、固态、液态