Compared with the generation of our grandparents, who grew up in an age when people were lack of almost every kind of materials, we should be content with the ____ supply. 

However，at times this balance in nature is _______ resulting in a number of possibly unforeseen effects.

It is reported that the drivers who use mobile phones while driving are more ______ to have accidents.

You job here is only _____, for you will be removed from it when we have a proper post for you．

What upset us was that our flight was delayed because of the ________ storm.