giving attention to what you are doing = c______ a soft sound or voice = w_______横线上填什么,就是根据意思写出单词.
问题描述：
giving attention to what you are doing = c______ a soft sound or voice = w_______
横线上填什么,就是根据意思写出单词.
答
concentrate
whisper
答
concentrating
whisper