Correct the mistakes. Explain.
1) I have travelled a lot since you last saw me.
2) When he has called?
3) They had lived in Minsk for ten years and then they moved to Novgorod.
4) I did not have any English lessons this month.
5) Hi, I have seen Jane today. - Where have you seen her?
6) You know, Mr. Tipping has published a new book. - When has he published it?
7) How many books has Pushkin written?