1. Mary wants to become ( a / an / X ) nurse.

2. As ( a / an / X ) composer Mozart was peerless.

3. As ( a / an / X ) managing director Mr Jones introduced new production techniques.

4. He is ( a / an / X ) MP; if I'm not mistaken, he's ( a / an / X ) Labour MP for Stepney.

5. What ( a / an / X ) heated debate the Tenants' Association had last night!

6. What ( a / an / X ) heated debate did you mention just now?

7. This is ( a / an / X ) wonderful opportunity to become ( a / an / X ) part of a young and enthusiastic organization which has ( a / an / X ) exciting future.

8. Tom has ( a / an / X ) long hair and ( a / an / X ) stubbly beard.

9. The receptionist listened to all the complaints without turning ( a / an / X ) hair.

10. As ( a / an / X ) result of corruption on ( a / an / X ) large scale the election was lost.

11. The local companies are willing to offer ( a / an / X ) employment to almost any applicant.

12. Jane has gone to Stockholm to find ( a / an / X ) work.