4. What do the signs mean? Use must/ mustn't. no smoking Sorry! No animals Thank you Keep dogs on leads

4. What do the signs mean? Use must/ mustn't.

The signs indicate rules or prohibitions. 'Mustn't' is used for prohibitions, and 'must' would be used for obligations. Based on the context of signs, these are typically prohibitions.

• no smoking - You mustn't smoke here.
• Sorry! No animals Thank you - You mustn't bring animals here.
• Keep dogs on leads - You must keep dogs on leads. (This is an obligation).

Answer: 1. mustn't smoke, 2. mustn't bring animals, 3. must keep dogs on leads