东边日出西边雨，（）。（唐·刘禹锡《竹枝词》）
参考答案：道是无晴却有晴
根据句意和汉语注释，写出单词的正确形式。
1. When the doctor came, the victim has already stopped _______ (呼吸).
2. _______ (立即), the enemy disappeared on the early foggy morning.
3. It's not surprising to see so many _______ (推销员) in such a big electrical shop in China.
4. As we know, air _______ (污染) might cause many serious diseases.
