单选题 He was______by the noise outside yesterday evening and could not concentrate on his study.
【正确答案】 C
【答案解析】[解析] 四个选项中只有perturbed“感到不安”符合句意，如：Mother was much perturbed by my illness．(母亲为我的病甚感烦恼不安。)其他选项pecked“啄食”；oriented“导向”；paddled“划桨，搅拌”都不正确。