— Tom, would you do me a favor? I'm in a mess. 

—  ______. I'm just answering a call. [ ]

A. Of course

B. Not at all

C. With pleasure

D. Wait a minute, please

直接灭火就是直接用（）在火源附近直接扑灭火灾。

A、水

B、沙子

C、灭火器

D、黄土