6-B: We found out the train had left ten minutes before we got to the station.
7-D: After our plane had landed, we waited an hour for our luggage
8- F: I noticed I had left my pass at home.
9-C: I had never really travelled until I decided to study abroad.
10-E: The waiter had taken my plate before I finished eating my meal.
11-A: When we got to the hotel, we learnt they had lost our reservation.
Chúc bạn học tốt nha!