It’s necessary to be prepared for a job interview. will certainly do you good.A. Well dre

问题补充：

It’s necessary to be prepared for a job interview. will certainly do you good.

A. Well dressed

B. Well dressing

C. Being well dressed

D. Well dressing up

答案：

A. Well dressed

B. Well dressing

(答案→)C. Being well dressed

D. Well dressing up

解析：考查非谓语动词作主语。句意：参加工作面试时有必要做准备，穿合适的衣服肯定对你有好处。doing能作主语，表示“穿着什么样的衣服”需用be dressed in，由此可知答案为being well dressed。