9. A steam engine transforms heat _______ power.

8. We're rather concerned _______ his health.

7. We must be prepared _______ the unexpected.

6. You should combine theory _______ practice.

5. The car is racing _______ a frightening speed of 200mph.

4. I caught a glimpse _______ our new neighbor.

3. _______ general, a person who moves to a new place has to spend quite some time getting used to the new life.

2. That year something unfortunate happened _______ his family.

1. What's Tom _______?