You have to get rid of smoking, ____ you may die of lung cancer.
.. _________advertisements are of great help, I don’t think we should entirely rely on them.
.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.