Task 3. Choose the correct item.

1. Passengers must/mustn’t check-in their bags before they fly.

2. You needn’t/ must wear a coat, it’s quite warm.

3. Could/should you lend me some money, please?

4. You don't have to/mustn't go snorkeling in dangerous waters.

5. All my clothes are dirty! I need to/can do some laundry.​