Life is tough in the city.In order to lose their _________,some people drink alcohol.

Many countries are increasing their use of natural gas, wind and other forms of ____.

 This event not only raised _______ of world hunger, but also raised lots of money to help starving children.

----What do you know the _____ of are the pig influenza in humans? ---- usually similar to regular human seasonal influenza .

Being aware of the__________of the disaster, some famous stars organized a charity concert to raise money for the victims.