—I heard that Tom stole all the money from the old man.

—You’re joking! ________

A．I hope so.

B．I don’t agree.

C．I can’t believe it.

D．I don’t think so.

下列物质不能通过化合反应制取的是[ ]

A. Na₂SO₄            

B. Fe(OH)₃        

C. CH₃CHO         

D. CuS