单选题 He was looking impatient at the visiting salesman, who showed no signs of getting ready to leave.
【正确答案】 D
【答案解析】[解析] 本题考查副词的应用。此处，look at为动词短语，要用副词作状语对其进行修饰，所以应用impatiently。所以，答案是D。