1.It's worth to take this risk.
2.There has been lost more than 50 millions yuan by the fire disaster.
3.The global economy fall into risk in 2008.
4.Lots of merchant ships sank into the sea in the period of Ming dynasty .
5.The fact is anything that can be proved.
6.Witness must provide the fact rather than personal point of views.
7.When the gunpowders in the ship exploded ,the ship was sank.