The teacher spoke so fast that it was hard for the students to（）what he was saying.

A. take in

B. take off

C. take on

D. take after

某市某区人民政府决定将区建材工业局管理的国有小砖厂出售。小砖厂的承包人以侵犯其经营自主权为由提出行政复议申请，本案的行政复议机关应当是下列哪一个( )

A．市人民政府

B．市经济贸易局

C．市国有资产管理局

D．区人民政府