During periods of training, athletes may need to .......... their diet with extra vitamins. 

The salary is .........., based on a candidate's experience and qualifications.

Jack's very skilled at .......... business deals.

The use of shadow in drawing can create the illusion of a ............. object. 

The ........... of the closet are 80x180x80.

Surgeons use ........gloves to ensure hygiene. 

The average household............huge amounts of waste each year.

.........changes are documented by careful scientific research.

It is ........... for the bride to wear white at her wedding.

In chemistry, a low PH number indicates that a substance is ........... .