【题目】John hadn't been able to stop smoking suddenly; he had to control his smoking desire __________.
A. by and by B. sooner or later
C. little by little D. from time to time
在线课程【答案】C
【解析】考查短语。句意:约翰不能立即把烟戒掉，他得慢慢地控制烟瘾。by and by不久以后，不一会儿；sooner or later 迟早；little by little 相当于 step by step 渐渐地；from time to time时常地。