Mistakes don’t just happen, but they occur for a reason. What we ought to do is find out the reason and then making the mistakes _____________.

In order to help people to see the performance at the same time, they gave a _____ broadcast. 

Our       new machines are much cheaper to run.

Mary worked here as a ________ secretary and ended up getting a full-time job with the company.

He was a(n) ___________singer until the age of 40, when he turned professional.