参考答案

正确答案：A
解析：impulse冲动、一时的念头，如：“My uncle bought the house on an impulse.”；intuition 直观(能力)、直觉，如：“She sensed what was wrong by intuition. ”；instinct 本能、天性，如：“Mother hens protect their young by instinct.”；incentive 刺激、鼓励、动机，如：“The child has no incentive to study harder because his parents cannot afford to send him to college.”。