合同文本要做到标的明确，内容合法可行，主要条款完备，权利义务明确，违约责任具体，文字表达准确。
参考答案：对
---Come to my family for dinner, please.
---- .
A．I’m very busy
B．See you in the evening
C．Yes, I would
D．Oh, thank you for your invitation
实施奖励的原则是什么？
