找出错误并改正。

例:The old woman talk about her life many years ago.  ×  talk--talked

1. Many thanks for talk to us._____

2. I didn't have enough time do my homework._____

3. He live in a small house when he was a boy._____

4. There wasn't any trees in our school in the past._____

5. My friends have got lot of books._____

保险作为风险管理的一种方法，其基本作用是（）

A.分散风险，排除损失

B.排除风险，提高效益

C.消除风险，消化损失

D.分散风险，消化损失