我国城乡居民储蓄存款增长的根本原因是

①改革开放促进了我国经济的健康、快速发展  

②经济发展使人民收入不断提高

③存款越多，获利就越大                    

④国家对居民储蓄存款采取鼓励和保护政策

A．①②

B．②③

C．①③

D．②④

— I think smoking is bad for your health. You see the sign "No Smoking" there.

— Yes, I know. But I simply can't _____. [ ]

A. give it away

B. give it in

C. give it out

D. give it up