He stayed _________when I told him the terrible accident.

_______should not be allowed to get ears pierced.

The colour of the shirt is too_____. It doesn't go with my light blue trousers. 

Between 4.5 and 3.8 billion years ago, the earth became so ______ that it was not clear whether the shape would last or not.

You’d be exposed to a lot ______ pollution if you moved to a town with pure water and air.