1. Let’s / Why not / Shall we go to the cinema tomorrow evening? 2. Why don’t / Why not / Shall you buy her some jewellery for her birthday? 3. Let’s / Shall / Why not go to town by bus on Saturday? 4. Shall / Let’s / Why not we meet outside the supermarket at 7 o’clock? 5. Let’s / Shall / Why don’t visit the museum next week.