很高兴为你解答：用on/upon+doing造句 我一见到他就告诉他这个消息 On/upon seeing him, I will tell him the news good luck！
用on&47；upon+doing造句 我一见到他就告诉他这个消息
On seeing him, I will tell him about the news.2015-03-29
很高兴为你解答：
用on/upon+doing造句 我一见到他就告诉他这个消息
On/upon seeing him, I will tell him the news
good luck！2015-03-29
