根据下面的对话情景，在每个空白处填上一个适当的句子，使对话的意义连贯、完整。(共5小题，计l0分)

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

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

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

B :小题2:   . Where did it happen?

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

B:小题3:    ?

A: It happened on April 20th ,2013.

B:小题4:    .

A: We should try our best to help them.

B:小题5:   .

一列客车和一列货车同时从甲乙两个城市相对开出，已知客车每小时行55千米，客车与货车速度的比是11：9，两车开出后5小时相遇，甲乙两个城市间的铁路长多少千米？