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_____________________．

根据汉语提示，用定语从句完成下面句子。

我从没想到他是这样一个人。

I have never thought he is a man ________________．

根据汉语提示，用定语从句完成下面句子。

这是我所听过的最有趣的故事。

This is the most interesting story ________________．

根据汉语提示，用定语从句完成下面句子。

他是他们班第一个做出这道难题的人。

He is the first student ________________ in his class．

根据汉语提示，用定语从句完成下面句子。

我们应该把钱捐给需要帮助的人。

We should donate our money to those ________________．