1.When the finally ( arrive ) .....with the food , the guest( alread leave ) .....the restaurant.
=>arrived / had already left
2.The smiths ( spend ) ....two days in Hanoi before they(travel ) .....to sa pa last week
=>was spending/ travelled
3,I went to the box office at lunchtime,but they ( already sell ) ....all the tickets.
=>were already selling
4.I felt very tired when I got home , so I ( go ) ....straight to bed.
=>Went
5.Two days ago I ( meet ) ...an old friend who I ( not see ) ....for years.
=>met/did not see