Here are some idioms with their definitions:
1- Drastic times call for drastic changes: extreme measures to deal with extremely difficult situations.
2- Brain drain: highly qualifies people who do not return to their country.
3- Call it quits: when putting an end to an activity.
4- The cream of the crop: the best people, fo example graduates.
5- To be on the firing line: to be in a position to be criticized because of responsibilities.
6- Be sacked: leaving one's job because of having done something wrong.
7- Shape up or ship out: you have either to improve or leave the job.
8- Fast-track someone: to enable him to reach the desired position or status.
9- Keep your finger on the pulse: be aware of the most recent development.
10- Silver bullet: magical solution.
11- Work like a charm: something functioning very well.
12- Cutting edge: latest technological progress.
