1. Could I take a bottle of water on the plane?
2. Can you help me with these bags?
3. You had better not leave your luggage here.
4. May I use your mobile phone for a minute?
5. Jake, will you give me Maria's number?
6. You should avoid drinking coffee before your flight.
D.
1. checked in / got / were reaching / realised / left
2. heard / were not / informed
3. had served / fell
4. asked / boarded
