选A 理由: Embarrassed about what he did和not knowing what to say or to do.都是从句,表状态,都是省略句,完整的是He is embarrassed about what he did和he is not knowing what to say or to do.。主干句子是he stood there. 另外,动词...
Being embarrassed about what he did, he stood there, not knowing what to say or to do. 他对他的所作所为感到十分尴尬(羞愧),他站在那里,不知要说什么,要做什么。 本句话的完整句子是: being done引导原因状语从句。