7. Li Ming is responsible _________ organizing a singing team.

6. My sister is going to be __________ charge of the whole company after the boss flies to London.

5. We need a place _________ have a meeting this afternoon.

4. The teacher will arrive ________ three hours.

3. The teacher have arrived _________ three hours.

2. _________ my surprise, he solved the problem by himself.

1. It’s so cold outside that the river has changed __________ ice.

4. when he bought　　 5. that she won

4. will visit　 5. was