The Queen's last visit was in May,when she opened the new hospital这的When是副词还是介词?为什么?

解释分析句子 谢谢It's the client retention rate that concerns me, vis-a-vis maximizing return on sales 英语翻译They'll die for a Queen who's the last of her line,and barely more than a girl. 英语翻译The city’s strategic location on the boundary between Ontario and Quebec and some distance from the US border,influenced in the last century Queen Victoria’s choice of Ottawa as the capital over possible alternatives Montreal,Queen Vi The Queen's last visit was in May,when she opened the new hospital这的When是副词还是介词?为什么? Noblesse Queen!It's time to hit the road! Queen’s english是什么意思 Queen’s english是什么意思 queen victoria's wedding Queen's是什么意思? It's the last 女王 THE QUEEN怎么样 THE QUEEN OF CUP queen of the waves the Queen of The Snow Queen The queen is quite THE QUEEN怎么样 THE RED QUEEN怎么样