问题详情

What experience does the man have that may be helpful？

A．He knows how to operate the grading machine.

B．He has answered the telephone in a law office.

C．He has used computer programs for office work.

D．He has been a work-study student in another office.

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！