1. 选词填空。

down  talking  can't  carry  tidying

1. （1） I'm on the phone.
3. （2） She's her room now.
5. （3） —Who can help me?

   —Sorry, I . I'm doing my homework.

7. （4） The books are heavy. I can't them all.
9. （5） All the oranges are falling the stairs.