You can take as many books as you like here for they are free of ________.
Probability is the mathematical study of the _____ of an event's occurrence.
As soon as the children were _____, their mother got them out of bed and into the bathroom.
I hope my teacher will take my recent illness into _____ when judging my examination.
The child enjoyed _____ up the wooden bricks then knocking them down.
The illness from which Mary is suffering has now been _____ as hepatitis (肝炎).