—Those scientists invented a robot to care for kids!

—It’s not surprising．They ____ wonders all the time．

A．worked

B．were working

C．work

D．have been working

道路运输管理机构建立的机动车维修企业诚信信息，除涉及（）、商业秘密外，应当依法公开，供公众查阅。