合同是反映交易的法律形式，我国立法将合同定义为( )
A．契约
B．允诺
C．协议
D．条约
参考答案：C
___ his work, he started to play the computer games. [ ]
A. Being finished
B. Having finished
C. Finishing
D. Having been finished
禁忌洗胃的中毒药物是
A．敌敌畏B．敌百虫C．磷化锌D．氰化物E．硝酸
