请帮我解决这些英语填空 3 was leaving4，how5，had bought6，if/whether7 how much，costs8 how long9，was writing10 had
他去上海有一个星期了 英语怎么说 He has gone to Shanghai for a week.has been to 去过，去了又回来了has gone to 去了，去了还没回来
他两天前已经去上海了用英文怎么说？ He has gone to Shanghai two days ago.
