kǎo / shì / kuài / yào / kāi / shǐ / le / dà / jiā / dōu / míng / bai / yí / kè / qiān / jīn / zhuā / jǐn / shí / jiān / fù / xí

考试快要开始了，大家都明白一刻千金，抓紧时间复习。

The exam was about to begin, and everyone knew that every minute was precious, so they reviewed quickly.