1. Evaporation ____ the process by which a solid or liquid ____ into vapour by heat.

2. Dramatic changes have been taking place in the United States _____ .

3. As the decade ____ to wind down, Mark Morris ____ as our century’s youngest great choreographer.

4. Of the many attempts that ____ to regulate language one way or another, very few ____ .

5. In the past few months, our company director ____ more mettle than most industrialists ____ in an entire career.

6. Chinas economic boom ---- a growing need for energy that ---- only foreign supplies.

7. They hope that by surrounding city centres and likely terrorist targets with "soft walls", they it impossible for hijacked planes ---- anywhere near them.

8. New DNA evidence hints that "African Eve", the 150,000-year-old female ancestor of every person on Earth, ---- in Tanzania or Ethiopia.

9. Socrates ---- that we ---- with the improvement of our souls.

10. He ---- in a line of work that was dependent solely on his ability to win the trust of others, and one in which very close relationships ---- necessary.