---Look! The light is still on. Is Mr Wu working in his office?
---No, it _____ be Mr Wu. He has gone to Nanjing for a meeting.
A.needn’t | B.mustn’t |
C.can’t | D.wouldn’t |
---Look! The light is still on. Is Mr Wu working in his office?
---No, it _____ be Mr Wu. He has gone to Nanjing for a meeting.
A.needn’t | B.mustn’t |
C.can’t | D.wouldn’t |