Что из этого вставить в пропуск

01. ___ the end they decided to go there. at
on
in
02. ___ the end they decided to go there.
at
on
in
03. There are two teams ___ the football field.
in
at
on
04. A team ____ o scietists made a very important discovery.
for
of
about
05.The teenagers (wash) their bikes by the time their class (begin).
washed \\ began
had washed \\ began
washed \\ had begun
06.The new office__ has been working succesfully.
team
crew
07. The game ended ___ a draw.
in
with
up
08. I had done my flat ___ 5 o\'clock.
at
by
in
09. The team joined ___ the game.
in
___
for
10. When we returned, they (disappear).
disappered
have disappeared
had disappeared