36. Immediate action should be _______ to prevent people from being affected by the bird flu.
. I feel honored to introduce Mr White to you, without _________consideration our project would have ended in failure.
. To our surprise, that top student in our class failed _________a scholarship.
. The building burnt down in a big fire. _________was the base on which it stood.
. If a computer crashes, you will lose the file you _________unless you save it regularly.
. The driver _________, according to the newspaper, to have been killed in the traffic accident.