O RULES 1 We use a/an to talk about something for
the first time.
2 We use a/an with singular countable
nouns.
3 We use the when there is only one.
4 We use the to talk about something again.
At lunchtime Becky Jackson buys a sandwich
and some chocolate. She goes to a shop near
her school. Her friend Annie goes to the shop
too. But Becky's other friends have lunch at
the school cafeteria.