Find the right answer.

..................... did they leave for Spain?
1. How long before
2. Before how long
3. How long ago
She's been watching TV ........... 3 o' clock in the afternoon.
1. since
2. for
3. from
She fell asleep ............ the play (θεατρικό έργο)
1. as
2. whie
3. during
No sooner .............. he left than his wife called.
1. had
2. did
3. have
.......... I go to Paris, I visit the Eiffel Tower.
1. However
2. Whenever
3. Whatever
All his friends congratulated him ....... getting his degree.
1. for
2. on
3. in
I don't believe ........ ghosts.
1. on
2. in
3. at
In summer my village is crowded ........... tourists.
1. with
2. about
3. for
This forest must be saved ...... all costs.
1. for
2. at
3. to
The buses were ........ strike so we had to come by train.
1. in
2. at
3. on