Ex-5 Complete the instructions with the words in the box. (always, do, don't, must, mustn't, never) 1) use a lighted match in this workshop
2) wash your hands after using these chemical.
3) enter this small place
4) You ___ wear safety boots when you lift this.
5) ___ not smoke in this factory.
6) You touch this machine with bare hands. It's hot.