用所给词的适当形式填空。1. Teachers' Day is September _____________ (ten).
2. The wind is _____________ (blow) the tree's leaves.
3. What day _____________ (be) yesterday?
4. Let's _____________ (sing) a song.
5. I don't _____________ (know).
试题答案
1. tenth 2. blowing 3. was 4. sing 5. know