题目内容：

根据下面的对话情景，在每个空白处填上一个适当的句子，使对话意义连贯、完整。

   A： Do you know the earthquake in China not long ago?

   B：1. ______________________. But I only know a little about the earthquake.

   A： Many people died and got hurt in the earthquake.

   B：2._______________________.Where did it happen?

   A： It happened in Ya’an， Sichuan Province.

   B：3.________________________?

   A： It happened on April 20th， 2013.

   B：4.________________________?

   A： We should try our best to help them.

   B：5._________________________.