单选题 John, keep your shirt on and don't get agitated. The underlined part means
A. keep your cool. B. keep out the cold.
C. put your shirt on. D. press out the shirt.

【正确答案】 A
【答案解析】[解析] 本题考查固定习语。keep one's shirt on意为保持冷静即keep one's cool(保持镇静，保持自制力)，故选A。