Put in a/an or the in these sentences where necessary. Write down the articles with small letters in one line, separated by a comma. Don't put the full stop after the last article.

Example: a, a, an, an, the, the

1. Would you like ____ apple?

2. How often do you go to _____ dentist?

3. Could you close ____ door, please?

4. I'm sorry. I didn't mean to do that. It was ____ mistake

5. Excuse me, where is ____ bus station, please?

6. I've got _____ problem. Can you help me?