1. He is o_______ in writing his novel all day, only stopping to smoke once in a while.

2. The museum is built in honour of his c__________ to science.

3. Our football team c_______ of two coaches and twenty players.

4. The old computer in our classroom has been r_______ with a new one.

5. His parents r______ pigs to make a living.

6. Your reading speed and comprehension largely depend on the v_________ you have.

7. As we know, air is a m_______ of kinds of gases.

8. Children gradually learn to make a d________(区分) between right and wrong as they grow up.

9. These birds are very rare and t______ protected by law.

10. The British were d_______(打败) by the Americans in 1781.

11. Sam speaks English with an Australia a_______.

12. Don’ worry. With the help of the firefighters, the fire is now under c_______.