1. It's getting late. We must _"be off"___ now. Which of the following can't replace the underlined part?
2. We didn't plan our art exhibition like that but it _____ very well.
3. The slaves here _____ from Africa loved their music.
4. The father as well as the mother and their children _____ to make up a trip to Beijing.
5. After the accident, the police _____ to help the wounded people.
C.were called in
D.was called in