Give the correct form of the word in brackets:
1. Additional training is probably the best way to _____________ your career these days. (far)
2. The business was brought to a _____________ by the postal workers' dispute. (stand)
3. Even the development of the peacekeeping troops couldn't prevent another _____________ of heavy fighting in the trouble spot. (break)
4. Researchers reported several important _____________ in career research. (break)
5. Eric has been studying _____________ and hopes to make a good technical designer in the future. (engine)