介绍:
Unit13
1. The film is about to start.
2. The speech is about to start.
3. The plane is about to take off.
4. Autumn harvest is about to start.
5. The book I edited is to appear soon.
6. We are to meet at the foot of the hill.
7. You are to be back before 7 o'clock.
8. There is to be a sports meeting on Saturday.
