Bài 1: Điền "a/an" hoặc ∅ vào chỗ trống sao cho thích hợp.
1. My mother need________ information about the flights.
2. I'd like________ apple and________ grapefruit, please.
3. Are you afraid of________ big dogs?
4. We read________ books all the morning.
5. Do you have________ umbrella?
6. Did you drink________ wine yesterday?
7. They've bought________ very expensive car.
8. I had________ bread and________ cheese for breakfast.
9. Please bring me________ glass of water.
10. My sister bought me________ new dress.
11. I never have________ eggs for dinner.
12. I don't like________ coffee but I like________ tea.
13. Tim doesn't want to ask his mother for________ money.
14. Do you want to add________ sugar in your coffee?
15. There is________ piece of cake in the fridge.