Complete the sentences with a/an or nothing (-).
Can I have a glass of water?
1. Would you like ____ rice or potatoes with your denner?
2. They say it will be _____ good weather this weekend.
3. This bed is made of ____ iron.
4. Have you seen ____ lion yet?
5. Sha's got ____ long? black hair.
6. I haven't got ____ room for your  books in my bag.
7. Sue's ____ old friend from university.