四、选择合适的疑问词补全对话。
| Why | What | When | How | Which |
| Where | How old | How many | Whose | Who |
1. —______ are you doing?
—I am eating lunch.
2. —______ books are these?
—They are Sarah's.
3. —______ do you like summer?
—Because I can eat ice creams.
4. —______ are the students?
—They are in the classroom.
5. —______ do you get up?
—I usually get up at 6:00.
6. —______ season do you like best?
—I like spring best.
7. —______ is that old man? —He's my grandpa.
8. —______ pens do you have? —I have six.
9. —______ are you? —I am fine, thank you.
10. —______ are you? —I am ten years old.

1.What　2.Whose　3.Why　4.Where　5.When　6.Which　7.Who　8.How many　9.How　10.How old