1. The landlady was sent out for a two-hour walk with the dog, no matter what the weather; whereupon the niece and the respectable looking middle-aged man promptly went upstairs. He was as regular as clockwork.
   無論天氣如何，房東太太要帶狗出去散步兩個小時，這時那侄女便和一個看上去很體面的中年男人上了樓。那人每天也真夠準時的。
2. One of the man insulted another, whereupon a fight broke out.
   其中一個男人侮辱了另一個男人，于是他們就打了起來。

where.up.on

conj.（連接詞）
On which.
在…之上，關于…
In close consequence of which:
隨之，據(jù)此：與…有密切因果聯(lián)系：
例句：
The instructor entered the room, whereupon we got to our feet.
教員走進了房間，隨之我們?nèi)玖似饋?/br>