Ответ:
1) She asked me when it had been the first time I met my friend.
2) She asked me how long it had been since I got a new friend.
3) He said that he could trust his friend totally.
4) She said that Mary always supported her when she was in need.
5) He said that he would go out on a picnic with his friends.
6) She said that her mum had always been the most important friend in her life.
7) Mum said that a friend was like a plant of slow growth.
8) Father asked me what had happened to my friend.
9) She asked me who I went to when I had problems.
10) He said that they were having a debating on friendship then. / =at that moment.