Underline the correct item

1. I believe Sam will have a brilliant career (in/by) law.

2. (In/At) the beginning of his career, Thomas Edison mostly invented telegraphic devices.

3. Mary was (under/in) charge of presenting our science project to the class yesterday.

4. Joe couldn't believe it (while/when) he won first prize at the science show.

5. Abraham Lincoln began his political career (at/in) the young age of twenty-three

6. The great scientist Alexander Fleming died (by/of) heart problems.

7. I don't think Evelyn can work well (under/in) pressure; maybe someone else should do this project.

8. (Before/When) Leonardo Da Vinci had a bright idea, he wrote it down in his notebook.

9. Her husband's new job brings (around/in) an extra 200 pounds a week

10. (While/As soon) Mike sold his first invention, he started working on some ideas about a new one.