Inversion is a grammatical construction where the normal order of words is reversed, typically for emphasis or in formal contexts. Here are the sentences rewritten with inversion:

1. **Were the chemical to leak**, a large area of the sea would be contaminated.
2. **Were Germany to beat Romania**, they would face Italy in the final.
3. **Were Mr. Morgan still headmaster**, he would not permit such bad behavior.
4. **Had you given it on time**, you would have got a high mark.
5. **Had she become a lawyer**, as her parents wished, she would have earned a large salary.
6. **Had anything gone wrong with my plan**, I would have held responsibility.
7. **Were the Government forced into another election**, it would be the favorite to win.
8. **Should you wish to make an appointment to see Dr. Simon**, she is available between 9:00 and 11:00.
9. **Should you decide to accept the post**, you will be expected to start work on April 1st.
10. **Should you have further problems with your printer**, contact your dealer for advice.
11. **Hard though he works**, he can't earn enough money to support his family.
12. **So great was her grief** that she almost fainted.
13. **No sooner had he returned from his work** than he got down to writing the letter.
14. **Only when they told me about it later** did I realize what I had missed.

These inversions add a formal tone and can emphasize certain parts of the sentence.