Word Formation. Choose the correct form of the word.

Did you know that playing tennis with a badly strung racket while ... worn-out shoes can increase your risk of injury almost as much as playing football without shoulder pads?
Using the wrong — or not ... fitted — equipment is a major cause of injuries. Do you ever worry about getting injured while playing sports?
Helmets Are The Key
The equipment, you wear while participating in sports and other ... , is the key to preventing injuries.
Start with helmets: They're ... for sports such as football, hockey, baseball, softball, biking, skateboarding, skating, skiing, and snowboarding.
Eye Protection
Eye ... is also a must for many sports. The most ... eye gear is made from the plastic called polycarbonate and has been tested especially for sports use.
If you go skating, skateboarding, or riding a scooter, you should wear guards.