Заполните пропуски в инструкции следующими словами
1. Don’t enter the warehouse without 1 _______ on this overall and safety helmet.
2. 2 _______ eat or drink while operating this machine.
3. Only start 3 _______ and drive away after fastening your safety belt.
4. This engine must be checked by expert 4 _______.
putting
Never
the car
technicians