The police failed to come up with ______ evidence, and on that account the suspect was released.

It is __________ to spend money on preventing illnesses by promoting healthy living rather than spending on trying to make people ___________ after they are ill.

The listeners were much        than hoped. There were so many tickets left.

Look , dark clouds are gathering. It is ________to rain.

The most important thing is to keep _____ when you get into difficulties.