adv.向何处,为什么
He insulted her, whereupon she slapped him.
他侮辱她, 于是她给了他一巴掌.
He saw me coming, whereupon he offered me his seat.
他看到我进来, 便把他的座位让给了我.
He told her she was a liar, whereupon she walked out.
他对她说她在说谎,她便愤然而去。