Doctors are doing research to find out what happens physically when people smoking.
A. quit
B. decline
C. depart
D. reserve
网友回答
(答案→)A. quit
B. decline
C. depart
D. reserve
解析：本题考查动词辨析。句意为“医生们正在研究以便发现当人们戒烟时，他们身体上将会发生什么情况”。decline下降；prevent阻止；reserve预订。