根据音标或首字母填写恰当单词，每空一词．
When I opened the door， I found a white world with thick ______ /snəu/
The Hong Kong﹣Zhuhai﹣Macao is considered as one of the "seven wonders of the （现代的） world． "
The driver （后悔） his carelessness in diving and went to the hospital to say sorry to his passengers．
People all over the country feel proud that all China's spacecraft have （成功地） returned to the earth．
Last weekend， at the welcome party， the host （介绍） the history and culture of Taizhou to the guests．
Shared bikes can help people travel around freely in cities without （污染）．