1．(2019年浙江卷·阅读理解A)She ________ (regret) the way she had handled the call.
2．To find a good job, I need to continue my education, ________ (equip) myself with rich knowledge.
3．In all cases, you should implement and test all changes in your test environment before you consider adding them to your ________ (produce) environment.
4．(2019年新课标Ⅱ卷·阅读理解C)That ________ (free) to choose is one reason more people like to eat alone.
