非谓语动词一题Volunterrs will be on the front line in welcoming the
非谓语动词一题
Volunterrs will be on the front line in welcoming the foreigners to China,______in beautiful uniforms and using English to help the visitors.
横线上给的答案是dressed,为什么不是being dressed呢?这两种形式有什么区别?悬赏++++ing