fact, he is thirsty for cigarettes, and needs the nicotine in cigarettes to 18 him, making him feel calm and act 19 . Consequently, the person who gets hooked on smoking finds it hard to 20 the overwhelming desire for one cigarette. Like a ghost, the cigarette haunts the smoker and makes him yield to the desire. That’s why experts suggest that a smoker should quit smoking by using a(n) 21 method rather than a gradual one so that he only needs to endure the pain for a shorter time.