题目内容：

Anything that involves （）on what he is doing is anathema to him.Aconcentrate Bconcentrating Cto concentate.Dconcentrated.

优质解答

B concentrating
Anything that involves (concentrating on what he is doing) is anathema to him
involves 要接名词/名词短语/名词从句
括号内是名词从句.