I have to clock in by eight.

　　我必須八點前打卡上班。

　　The clock in the hall has rung.

　　大廳里的鐘己經(jīng)敲響。

　　What time was it in fact when Tom looked at the clock in the mirror?

　　湯姆從鏡子里看鐘的時候，實際上是幾點了？

　　The clock in the tower strikes at noon.

　　中午的時候在塔樓里面的時鐘敲打著。