A you are free B it is free C feel free D be free区别

问题描述:

A you are free B it is free C feel free D be free区别
--here ,your new computer is ready .
--thank you
--____to call this number if you have any problems
Ayou are free B it is free C feel free D be free
为什么选C

A表示:你有空;B表示:免费 C表示:无忧无虑 D表示:*cd都可以选的样子啊从上下文看选C好些,表示:不要有顾忌