1. It’s so cold outside that the river has changed __________ ice.
2. _________ my surprise, he solved the problem by himself.
3. The teacher have arrived _________ three hours.
4. The teacher will arrive ________ three hours.
5. We need a place _________ have a meeting this afternoon.
6. My sister is going to be __________ charge of the whole company after the boss flies to London.
7. Li Ming is responsible _________ organizing a singing team.
8. You need __________ write these on your notebook.
9. The guest has just arrived __________ the station.
10. He hasn’t arrived __________ Shanghai yet.
