Заполните пропуски в инструкции следующими словами:
1. To protect the 1_______, goggles must be worn.
2. To protect the head, a 2_______ must be worn.
3. To prevent electric shocks, the power must be 3_______.
4. 4 _______ burns to the hands, rubber gloves must be worn.
eyes
helmet
switched off
to prevent