—Smoking and drunkenness(酗酒) are both bad for people’s health.       

—Yes. So we should ______ cigarettes and alcohol.        [ ]

A. shut down                

B. get on with

C. stay away from            

D. put away

定金是合同当事人一方为了证明合同的成立和保证合同的执行，向第三方预先付给的一定数额的货币。