英语词性转换的题目求助

Let's finish the job in the____shortest______time(short)
We must e careful when we cross the road because___safety_______comes first(safe)
Books can bring us___happiness______(happy)
We bought some__decoration_____to make our rooms more beautiful(decorate)
In this Thai restaurant,you can eat a lot of____tasty______food(taste)
We need some pieces of____coloured______paper to make kites(colour)