下面的句子中哪些含有定语从句？请你找出来，将其序号写在下面的横线上。

1．Haven't you finished the work that I ask you to do?

2．I haven't decided which great person to write about．

3．Do you think he is the greatest runner in the world?

4．How do you get the information that you need?

5．I believe that she is the most famous explorer that I have ever known．

6．Christopher Columbus was the man who discovered America．

7．Neil Armstrong is the first man to walk on the moon．

8．I couldn't believe my eyes when I first saw her yesterday!How beautiful she was years ago!

含用定语从句的句子有_____________________．

下面各句中哪些是含有定语从句的复合句？请从中找出引导定语从句的关系代词，在它们的下面划线。

1．Do you know who called me just now?

2．I will never forget him who helps me when I am in trouble．

3．Have you decided which to buy?

4．He always wants to get everything which he hopes to have．

5．The boy told me that he had lived in a very poor and small village for years．

6．Have you found out the place that you will go to on the map?

7．Never tell your secrets to him that can't keep secrets．

8．God helps him who helps himself．