— I say, Harry, What did you say to the laid –off worker just now ?

— Nothing, I ______ to myself.

A．had only talked

B．am only talking

C．have just talked

D．was just talking

以下不属于食品污染物范畴的是（）。

A.重金属

B.食品添加剂

C.寄生虫

D.微生物

E.河豚毒素