Grammar Exercise: Factory Signs - Must and Mustn't

1. ALL VISITORS MUST REPORT TO FACTORY MANAGER
    Correct
    Not Correct

2. PHOTOS MUST BE TAKEN ONLY OUTSIDE
    Correct
    Not Correct

3. VISITOR PARKING FREE - YOU MUSTN'T PAY
    Correct
    Not Correct

4. PHONES MUSTN'T BE SWITCHED ON INSIDE FACTORY
    Correct
    Not Correct

5. IF YOU HEAR ALARM, YOU MUSTN'T LEAVE QUICKLY AND SAFELY
    Correct
    Not Correct

6. DRIVERS MUST STAY UNDER 10 MPH
    Correct
    Not Correct

7. PROTECTIVE HELMETS MUST ALWAYS BE WORN
    Correct
    Not Correct

8. SMOKERS MUSTN'T GO OUTSIDE TO SMOKE
    Correct
    Not Correct